src/Web/ClientProxy.php
public function redrawForm($formName, $sHTML)
    {
        if ($this->isRpc) {
            $this->_formsOutput[$formName] = $this->buildTargetContent($formName, $sHTML);
        } else {
            $this->_formsOutput[$formName] = $sHTML;
        }
    }
public function redrawForm($formName, $sHTML)
    {
        if ($this->isRpc) {
            $this->_formsOutput[$formName] = $this->buildTargetContent($formName, $sHTML);
        } else {
            $this->_formsOutput[$formName] = $sHTML;
        }
    }
Replace the form content with the provided html text,
encoded html string returns to browser,
it'll be processed by client javascript.

@param string $formName - name of the html form on client
@param string $sHTML - html text to redraw the form
@return void