Illuminate\Database\Query\Builder::__construct PHP Method

    public function __construct(ConnectionInterface $connection, Grammar $grammar = null, Processor $processor = null)
    {
        $this->connection = $connection;
        $this->grammar = $grammar ?: $connection->getQueryGrammar();
        $this->processor = $processor ?: $connection->getPostProcessor();
    }

 /**
  * Create a new join clause instance.
  *
  * @param  \Illuminate\Database\Query\Builder $parentQuery
  * @param  string  $type
  * @param  string  $table
  * @return void
  */
 public function __construct(Builder $parentQuery, $type, $table)
 {
     $this->type = $type;
     $this->table = $table;
     $this->parentQuery = $parentQuery;
     parent::__construct($parentQuery->getConnection(), $parentQuery->getGrammar(), $parentQuery->getProcessor());
 }