public function getLookup($name)
    {
        $name = strtolower($name);

        return (array_key_exists($name, $this->lookup)) ? $this->lookup[$name] : false;
    }
public function getLookup($name)
    {
        $name = strtolower($name);

        return (array_key_exists($name, $this->lookup)) ? $this->lookup[$name] : false;
    }
public function getLookup ( $ name ) { $ name = strtolower ( $ name ) ; return ( array_key_exists ( $ name , $ this -> lookup ) ) ? $ this -> lookup [ $ name ] : false ; }
Looks in the lookup cache for the function.

Repeat calls to an undefined function are cached.

@param string $name Function name.

@return TwigFunction|false
Looks in the lookup cache for the function .