kernel/lib/Form/Container.php
public function isClicked(string $sElementName) : bool
    {
        if (isset($_POST[$sElementName]) && $_POST[$sElementName]) { return true; } else { return false; }
    }
public function isClicked(string $sElementName) : bool
    {
        if (isset($_POST[$sElementName]) && $_POST[$sElementName]) { return true; } else { return false; }
    }
if this form is validate and save

@access public
@param  string $sElementName element name what we want test the click
@return boolean