$this->moduleClassNameForPhrases
This stores the VLP classname used for phrases in your Plugin.
Can be used in methods called by plugins. From Zenario 7.0.0 onwards.
You can also access this variables from your JavaScript code using syntax of the form:
module_class_name.moduleClassNameForPhrases
where module_class_name
is your Module's class name.
This is mainly useful for debugging; it lets you check if you have correctly set your Plugin's VLP classname.
Some API functions also check this variable, however they will check it automatically without needing you to pass it as an input.