With the class argument, you can restrict the listing to components of a particular class.
By default, only the components in the current namespace are listed (see the change-namespace command). If no current namespace has been selected, only top-level components are shown. The component argument can be used to override the current namespace.
With the -all flag, list all components, regardless of where they live. With the -recursive flag, in addition to listing all components that are in the selected namespace, also list all components in the namespaces below it. With -t, list only top-level components.