class Asciidoctor::Extensions::Registry

def activate document

Returns the instance of this [Registry].

document - the {Asciidoctor::Document} on which the extensions are to be used.

associated with this registry.
Public: Activates all the global extension {Group}s and the extension {Group}s 
def activate document
  @document = document
  (Extensions.groups.values + @groups.values).each do |group|
    case group
    when ::Proc
      case group.arity
      when 0, -1
        instance_exec(&group)
      when 1
        group.call self
      end
    when ::Class
      group.new.activate self
    else
      group.activate self
    end
  end
  self
end