public StreamingJsonBuilder(Writer writer,Object content,JsonGenerator generator) throws IOException {
  this.writer=writer;
  this.generator=generator;
  if (content != null) {
    writer.write(generator.toJson(content));
  }
}

public StreamingJsonBuilder ( Writer writer , Object content , JsonGenerator generator ) throws IOException { this . writer = writer ; this . generator = generator ; if ( content != null ) { writer . write ( generator . toJson ( content ) ) ; } }
instantiates a json builder , possibly with some existing data structure and the given generator .
