parameters: (self, id)
return_statement: return result
docstring: Return true if the field defines such a value.
docstring_summary: Return true if the field defines such a value.
docstring_tokens: Return true if the field defines such a value .
function: def has_value(self, id):
      """
      Return true if the field defines such a value.
      """
      result = None
      if (id in self.widget.property_names) or \
         (not self.is_delegated(id)):
        result = ZMIField.has_value(self, id)
      else:
        proxy_field = self.getTemplateField()
        if proxy_field is not None:
          result = proxy_field.has_value(id)
      return result
function_tokens: def has_value ( self , id ) : result = None if ( id in self . widget . property_names ) or ( not self . is_delegated ( id ) ) : result = ZMIField . has_value ( self , id ) else : proxy_field = self . getTemplateField ( ) if proxy_field is not None : result = proxy_field . has_value ( id ) return result