The license text.
This can be used to set a custom text for the license if it can't be set via property@AboutWindow:license-type.
When set, property@AboutWindow:license-type will be set to gtk.types.License.Custom.
The license text will be displayed on the Legal page, below the copyright information.
License text can contain Pango markup and links.
adw.about_window.AboutWindow.addLegalSection can be used to add license information for the application dependencies or other components.
Builder instance for fluent chaining
Set license property.