src/Table/Table/Table.php
public function isSourceQueryBuilder()
    {
        return is_object($this->getSource()) && get_class($this->getSource()) == \Illuminate\Database\Query\Builder::class;
    }
public function isSourceQueryBuilder()
    {
        return is_object($this->getSource()) && get_class($this->getSource()) == \Illuminate\Database\Query\Builder::class;
    }
public function isSourceQueryBuilder ( ) { return is_object ( $ this -> getSource ( ) ) && get_class ( $ this -> getSource ( ) ) == \ Illuminate \ Database \ Query \ Builder :: class ; }
Return true if the source is an instance of \Illuminate\Database\Query\Builder

@return bool
Return true if the source is an instance of \ Illuminate \ Database \ Query \ Builder