class NormalUnitPrinter extends LabeledUnitPrinter {

  public NormalUnitPrinter(Body body) {
    super(body);
  }

  @Override
  public void type(Type t) {
    handleIndent();
    output.append(t == null ? "<null>" : t.toQuotedString());
  }

  @Override
  public void methodRef(SootMethodRef m) {
    handleIndent();
    output.append(m.getSignature());
  }

  @Override
  public void fieldRef(SootFieldRef f) {
    handleIndent();
    output.append(f.getSignature());
  }

  @Override
  public void identityRef(IdentityRef r) {<FILL_FUNCTION_BODY>}

  @Override
  public void literal(String s) {
    handleIndent();
    output.append(s);
  }
}

    handleIndent();
    if (r instanceof ThisRef) {
      literal("@this: ");
      type(r.getType());
    } else if (r instanceof ParameterRef) {
      ParameterRef pr = (ParameterRef) r;
      literal("@parameter" + pr.getIndex() + ": ");
      type(r.getType());
    } else if (r instanceof CaughtExceptionRef) {
      literal("@caughtexception");
    } else {
      throw new RuntimeException();
    }
  
<methods>public void <init>(soot.Body) ,public Map<soot.Unit,java.lang.String> labels() ,public Map<soot.Unit,java.lang.String> references() ,public void unitRef(soot.Unit, boolean) <variables>protected java.lang.String labelIndent,protected Map<soot.Unit,java.lang.String> labels,protected Map<soot.Unit,java.lang.String> references