needsEnvironment example

        parent::__construct(['arguments' => $arguments], ['name' => $name, 'is_defined_test' => false], $lineno);
    }

    public function compile(Compiler $compiler)
    {
        $name = $this->getAttribute('name');
        $function = $compiler->getEnvironment()->getFunction($name);

        $this->setAttribute('name', $name);
        $this->setAttribute('type', 'function');
        $this->setAttribute('needs_environment', $function->needsEnvironment());
        $this->setAttribute('needs_context', $function->needsContext());
        $this->setAttribute('arguments', $function->getArguments());
        $callable = $function->getCallable();
        if ('constant' === $name && $this->getAttribute('is_defined_test')) {
            $callable = 'twig_constant_is_defined';
        }
        $this->setAttribute('callable', $callable);
        $this->setAttribute('is_variadic', $function->isVariadic());

        $this->compileCallable($compiler);
    }
}

 elseif (\function_exists($cb)) {
                $refl = new \ReflectionFunction($cb);
            } elseif (\is_string($cb) && preg_match('{^(.+)::(.+)$}', $cb, $m) && method_exists($m[1], $m[2])) {
                $refl = new \ReflectionMethod($m[1], $m[2]);
            } else {
                throw new \UnexpectedValueException('Unsupported callback type.');
            }

            $args = $refl->getParameters();

            // filter out context/environment args             if ($entity->needsEnvironment()) {
                array_shift($args);
            }
            if ($entity->needsContext()) {
                array_shift($args);
            }

            if ('filters' === $type) {
                // remove the value the filter is applied on                 array_shift($args);
            }

            

        parent::__construct(['node' => $node, 'filter' => $filterName, 'arguments' => $arguments], [], $lineno, $tag);
    }

    public function compile(Compiler $compiler): void
    {
        $name = $this->getNode('filter')->getAttribute('value');
        $filter = $compiler->getEnvironment()->getFilter($name);

        $this->setAttribute('name', $name);
        $this->setAttribute('type', 'filter');
        $this->setAttribute('needs_environment', $filter->needsEnvironment());
        $this->setAttribute('needs_context', $filter->needsContext());
        $this->setAttribute('arguments', $filter->getArguments());
        $this->setAttribute('callable', $filter->getCallable());
        $this->setAttribute('is_variadic', $filter->isVariadic());

        $this->compileCallable($compiler);
    }
}