#[TemplateFunction]
Attribute on methods.
Registers a public method of a service as a Twig function.
The service is resolved only when a template calls the function. The return
value is escaped like any other output unless html is true; then it is
printed as is and the method must return a string. Arguments are passed
unescaped, so an HTML function must escape every argument it puts into its
result.
With public: true, a plugin offers the function to the templates of other
consumers (the theme, other plugins). Its name must start with the template
prefix of the plugin (the slug with underscores, e.g. my_plugin_) and its
signature must not use classes of the framework or of other dependencies.
Consumers declare the plugin in extra.wp-app-framework.template-plugins
of their composer.json and call the function by its name.