You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: navigation.rs
    path of file: ./repos/flutter-rs/flutter-plugins/src
    
    the code of the file until where you have to start completion: //! This plugin is used for navigation in an app.
//! It handles flutter/navigation type messages.

use log::debug;
us
    
    fn on_method_call(&mut self, call: MethodCall) {
        debug!(
            "got method call {} with args {:?}",
            call.method(),
            call.raw_args()
        );
        call.not_implemented()
    }