lib/WebDriverPoint.php
public function moveBy($x_offset, $y_offset)
    {
        $this->x += $x_offset;
        $this->y += $y_offset;

        return $this;
    }
public function moveBy($x_offset, $y_offset)
    {
        $this->x += $x_offset;
        $this->y += $y_offset;

        return $this;
    }
public function moveBy ( $ x_offset , $ y_offset ) { $ this -> x += $ x_offset ; $ this -> y += $ y_offset ; return $ this ; }
Move the current by offsets.

@param int $x_offset
@param int $y_offset
@return WebDriverPoint The same instance with updated coordinates.
Move the current by offsets .