public function set($field, $value)
    {
        return $this->map(function ($item) use($field,$value) {
            $method = $this->concatSet($field);

            return $item->$method($value);
        });
    }
public function set($field, $value)
    {
        return $this->map(function ($item) use($field,$value) {
            $method = $this->concatSet($field);

            return $item->$method($value);
        });
    }
public function set ( $ field , $ value ) { return $ this -> map ( function ( $ item ) use ( $ field , $ value ) { $ method = $ this -> concatSet ( $ field ) ; return $ item -> $ method ( $ value ) ; } ) ; }
Set the value in the specific field.
@param $field
@param $value
@return ServiceCollection
Set the value in the specific field .