src/Thujohn/Pdf/dompdf/include/frame.cls.php
function get_containing_block($i = null) {
    if ( isset($i) ) {
      return $this->_containing_block[$i];  
    }  
    return $this->_containing_block;
  }
function get_containing_block($i = null) {
    if ( isset($i) ) {
      return $this->_containing_block[$i];  
    }  
    return $this->_containing_block;
  }
function get_containing_block ( $ i = null ) { if ( isset ( $ i ) ) { return $ this -> _containing_block [ $ i ] ; } return $ this -> _containing_block ; }
Containing block dimensions

@param $i string The key of the wanted containing block's dimension (x, y, x, h)
@return array|float
Containing block dimensions