code: public static ConstraintField getInstance(int value)
     {
        ConstraintField result = null;
  
        if (value >= 0 && value < FIELD_ARRAY.length)
        {
           result = FIELD_ARRAY[value];
        }
  
        return (result);
     }
docs: Retrieve an instance of the ConstraintField class based on the data read from an
  MS Project file.
  
  @param value value from an MS Project file
  @return ConstraintField instance