public function truncate() {
		$this->_map     = [];
		$this->_data    = [];
		$this->_models  = [];
		$this->_pointer = 0;
		
		return $this;
	}
public function truncate() {
		$this->_map     = [];
		$this->_data    = [];
		$this->_models  = [];
		$this->_pointer = 0;
		
		return $this;
	}
public function truncate ( ) { $ this -> _map = [ ] ; $ this -> _data = [ ] ; $ this -> _models = [ ] ; $ this -> _pointer = 0 ; return $ this ; }
Truncate a collection's data

@return Collection
Truncate a collection s data