Public: A Group is used to register one or more extensions with the Registry.
The Group should be subclassed and registered with the Registry either by invoking the {Group.register} method or passing the subclass to the {Extensions.register} method. Extensions are registered with the Registry inside the {Group#activate} method.
# File lib/asciidoctor/extensions.rb, line 495 def register name = nil Extensions.register name, self end
# File lib/asciidoctor/extensions.rb, line 500 def activate registry raise ::NotImplementedError end