Fluent builder implementation template for gio.initable.Initable
gio.initable.Initable is implemented by objects that can fail during initialization. If an object implements this interface then it must be initialized as the first thing after construction, either via gio.initable.Initable.init_ or gio.async_initable.AsyncInitable.initAsync (the latter is only available if it also implements gio.async_initable.AsyncInitable).
Module for Initable interface mixin