工作階段的產品設定選項：
json5 session: { url: "fuchsia-pkg://fuchsia.com/my_session#meta/my_session.cm", initial_element: { collection: "elements", url: "fuchsia-pkg://fuchsia.com/my_component#meta/my_component.cm" view_id_annotation: "my_component" } }
Field Type Description Default
urlstringStart URL to pass to `session_manager`.
initial_elementInitialElementSpecifies initial element properties for the window manager.