public function alphaBlending(Bool $blendMode = NULL) : GD
    {
        imagealphablending($this->canvas, (bool) $blendMode);

        return $this;
    }
public function alphaBlending(Bool $blendMode = NULL) : GD
    {
        imagealphablending($this->canvas, (bool) $blendMode);

        return $this;
    }
public function alphaBlending ( Bool $ blendMode = NULL ) : GD { imagealphablending ( $ this -> canvas , ( bool ) $ blendMode ) ; return $ this ; }
Sets alpha blending

@param bool $blendMode = NULL

@return GD
Sets alpha blending