code: def create_from(cls, another, **kwargs):
          
          reused_fields = {}
          for field, value in another.get_fields():
              if field in cls.FIELDS:
                  reused_fields[field] = value
          reused_fields.update(kwargs)
          return cls(**reused_fields)
docs: Create from another object of different type.
  
          Another object must be from a derived class of SimpleObject (which
          contains FIELDS)