public function popFront(){
		
		if($this->_ReadOnly){
			throw new ReadOnlyException(\get_called_class() . ' is read only');
		}
		
		if($this->isEmpty()){
			throw new \UnderflowException(\get_called_class() . ' is empty');
		}
		
		return \array_shift($this->_Arr);
		
	}
public function popFront(){
		
		if($this->_ReadOnly){
			throw new ReadOnlyException(\get_called_class() . ' is read only');
		}
		
		if($this->isEmpty()){
			throw new \UnderflowException(\get_called_class() . ' is empty');
		}
		
		return \array_shift($this->_Arr);
		
	}
public function popFront ( ) { if ( $ this -> _ReadOnly ) { throw new ReadOnlyException ( \ get_called_class ( ) . ' is read only' ) ; } if ( $ this -> isEmpty ( ) ) { throw new \ UnderflowException ( \ get_called_class ( ) . ' is empty' ) ; } return \ array_shift ( $ this -> _Arr ) ; }
Removes and returns the first element of the list
@return mixed
@throws ReadOnlyException
Removes and returns the first element of the list