code: func (c *Connection) Load(model interface{}, fields ...string) error {
  	q := Q(c)
  	q.eagerFields = fields
  	err := q.eagerAssociations(model)
  	q.disableEager()
  	return err
  }
docs: // Load loads all association or the fields specified in params for
  // an already loaded model.
  //
  // tx.First(&u)
  // tx.Load(&u)