docs: public <R> SingleOutputStreamOperator<R> map(CoMapFunction<IN1, IN2, R> coMapper) {
  
  		TypeInformation<R> outTypeInfo = TypeExtractor.getBinaryOperatorReturnType(
  			coMapper,
  			CoMapFunction.class,
  			0,
  			1,
  			2,
  			TypeExtractor.NO_INDEX,
  			getType1(),
  			getType2(),
  			Utils.getCallLocationName(),
  			true);
  
  		return transform("Co-Map", outTypeInfo, new CoStreamMap<>(inputStream1.clean(coMapper)));
  
  	}