currently we only support action-methods without parameters as well as std. action-listeners.
action-methods with parameters might be supported later on, but we can't support multiple methods with the same name but different parameter/s. that's a basic el issue (if a parameter value resolves to null, it isn't possible to determine the type of the parameter).
"workaround" for parameters:
- f:attribute + ActionEvent#getComponent#getAttributes#get