code: public boolean isInParameter(String key) {
          boolean isIn = false;
  
          if (this.getDirection(processKey(key)) == Direction.INOUT || this.getDirection(processKey(key)) == Direction.IN) {
              isIn = true;
          }
  
          return isIn;
      }
docs: Checks is specified key is IN parameter.
  IN and INOUT parameter would be considered as IN parameter
  
  @param key Key
  @return true - if key is IN parameter