docs: public void setValue(String fieldRefName, boolean returnedByProcedure)
      {
          this.fieldSource = SOURCE_FIELD;
          this.fieldRefName = fieldRefName;
          this.returnedByProcedure = returnedByProcedure;
          this.constantValue = null;
  
          // If the field reference is not valid, then disregard the value
          // of the returnedByProcedure argument.
          if (this.getFieldRef() == null)
          {
              this.returnedByProcedure = false;
          }
  
          // If the field reference is not valid, then disregard the value
          // of the returnedByProcedure argument.
          if (this.getFieldRef() == null)
          {
              this.returnedByProcedure = false;
          }
      }