class IsDefFunction extends AbstractFunction {


  private static final long serialVersionUID = 8641929538658275527L;

  @Override
  public String getName() {
    return "is_def";
  }

  @Override
  public AviatorObject call(final Map<String, Object> env, final AviatorObject arg1) {<FILL_FUNCTION_BODY>}

}

    if (arg1.getAviatorType() != AviatorType.JavaType) {
      throw new IllegalArgumentException(
          "Invalid argument type for is_def: " + arg1.getAviatorType());
    }
    final String varName = ((AviatorJavaType) arg1).getName();
    return AviatorBoolean.valueOf(
        env.containsKey(varName) || RuntimeUtils.getInstance(env).containsFunction(varName));
  
<methods>public non-sealed void <init>() ,public com.googlecode.aviator.runtime.type.AviatorObject call() throws java.lang.Exception,public com.googlecode.aviator.runtime.type.AviatorObject call(Map<java.lang.String,java.lang.Object>) ,public com.googlecode.aviator.runtime.type.AviatorObject call(Map<java.lang.String,java.lang.Object>, com.googlecode.aviator.runtime.type.AviatorObject) ,public com.googlecode.aviator.runtime.type.AviatorObject call(Map<java.lang.String,java.lang.Object>, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject) ,public com.googlecode.aviator.runtime.type.AviatorObject call(Map<java.lang.String,java.lang.Object>, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject) ,public com.googlecode.aviator.runtime.type.AviatorObject call(Map<java.lang.String,java.lang.Object>, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject) ,public com.googlecode.aviator.runtime.type.AviatorObject call(Map<java.lang.String,java.lang.Object>, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject) ,public com.googlecode.aviator.runtime.type.AviatorObject call(Map<java.lang.String,java.lang.Object>, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject) ,public com.googlecode.aviator.runtime.type.AviatorObject call(Map<java.lang.String,java.lang.Object>, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject) ,public com.googlecode.aviator.runtime.type.AviatorObject call(Map<java.lang.String,java.lang.Object>, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject) ,public com.googlecode.aviator.runtime.type.AviatorObject call(Map<java.lang.String,java.lang.Object>, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject) ,public com.googlecode.aviator.runtime.type.AviatorObject call(Map<java.lang.String,java.lang.Object>, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject) ,public com.googlecode.aviator.runtime.type.AviatorObject call(Map<java.lang.String,java.lang.Object>, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject) ,public com.googlecode.aviator.runtime.type.AviatorObject call(Map<java.lang.String,java.lang.Object>, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject) ,public com.googlecode.aviator.runtime.type.AviatorObject call(Map<java.lang.String,java.lang.Object>, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject) ,public com.googlecode.aviator.runtime.type.AviatorObject call(Map<java.lang.String,java.lang.Object>, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject) ,public com.googlecode.aviator.runtime.type.AviatorObject call(Map<java.lang.String,java.lang.Object>, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject) ,public com.googlecode.aviator.runtime.type.AviatorObject call(Map<java.lang.String,java.lang.Object>, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject) ,public com.googlecode.aviator.runtime.type.AviatorObject call(Map<java.lang.String,java.lang.Object>, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject) ,public com.googlecode.aviator.runtime.type.AviatorObject call(Map<java.lang.String,java.lang.Object>, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject) ,public com.googlecode.aviator.runtime.type.AviatorObject call(Map<java.lang.String,java.lang.Object>, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject) ,public com.googlecode.aviator.runtime.type.AviatorObject call(Map<java.lang.String,java.lang.Object>, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject) ,public transient com.googlecode.aviator.runtime.type.AviatorObject call(Map<java.lang.String,java.lang.Object>, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject, com.googlecode.aviator.runtime.type.AviatorObject[]) ,public java.lang.String desc(Map<java.lang.String,java.lang.Object>) ,public com.googlecode.aviator.runtime.type.AviatorType getAviatorType() ,public java.lang.Object getValue(Map<java.lang.String,java.lang.Object>) ,public int innerCompare(com.googlecode.aviator.runtime.type.AviatorObject, Map<java.lang.String,java.lang.Object>) ,public void run() ,public com.googlecode.aviator.runtime.type.AviatorObject throwArity(int) <variables>private static final long serialVersionUID