public void nextNull() throws IOException {
    peek();
    if (token != JsonToken.NULL) {
      throw new IllegalStateException("Expected null but was " + token
          + " at line " + getLineNumber() + " column " + getColumnNumber());
    }

    advance();
  }
public void nextNull() throws IOException {
    peek();
    if (token != JsonToken.NULL) {
      throw new IllegalStateException("Expected null but was " + token
          + " at line " + getLineNumber() + " column " + getColumnNumber());
    }

    advance();
  }
public void nextNull ( ) throws IOException { peek ( ) ; if ( token != JsonToken . NULL ) { throw new IllegalStateException ( "Expected null but was " + token + " at line " + getLineNumber ( ) + " column " + getColumnNumber ( ) ) ; } advance ( ) ; }
Consumes the next token from the JSON stream and asserts that it is a
literal null.

@throws IllegalStateException if the next token is not null or if this
reader is closed.
Consumes the next token from the JSON stream and asserts that it is a literal null .