public function addFunction(Twig_Function $function)
{
$this->functions[$function->getName()] = $function;
}
/**
* Registers a Function.
*
* @param Twig_Function $function A Twig_Function instance
*/
public function addFunction(Twig_Function $function)
{
if ($this->extensionInitialized) {
throw new LogicException(sprintf('Unable to add function "%s" as extensions have already been initialized.', $function->getName()));
}
$this->staging->addFunction($function);
}
