Function write_ime_messages_system 

pub fn write_ime_messages_system(
    ime_reader: EguiContextMessageReader<'_, '_, Ime>,
    egui_input_message_writer: MessageWriter<'_, EguiInputEvent>,
    egui_contexts: Query<'_, '_, (Entity, &EguiContextSettings, &mut EguiContextImeState, &EguiOutput), With<EguiContext>>,
)

Reads Ime messages and wraps them into EguiInputEvent, can redirect messages to FocusedNonWindowEguiContext.