code: func (m *DbMap) SelectNullInt(query string, args ...interface{}) (sql.NullInt64, error) {
  	if m.ExpandSliceArgs {
  		expandSliceArgs(&query, args...)
  	}
  
  	return SelectNullInt(m, query, args...)
  }
docs: // SelectNullInt is a convenience wrapper around the gorp.SelectNullInt function