class Rubocop::Cop::Style::ClassMethods

self, when defining class/module methods.
This cop checks for uses of the class/module name instead of

def on_defs(node)

TODO: Check if we're in a class/module 
def on_defs(node)
  definee, _name, _args, _body = *node
  convention(definee, :name) if definee.type == :const
end