code: func (f *Field) Store(row *PQLRowQuery, rowIDOrKey interface{}) *PQLBaseQuery {
  	rowStr, err := formatIDKeyBool(rowIDOrKey)
  	if err != nil {
  		return NewPQLBaseQuery("", f.index, err)
  	}
  	return NewPQLBaseQuery(fmt.Sprintf("Store(%s,%s=%s)", row.serialize().String(), f.name, rowStr), f.index, nil)
  }
docs: // Store creates a Store call.
  // Store writes the result of the row query to the specified row. If the row already exists, it will be replaced. The destination field must be of field type set.