checking for system ambiguity in bevy 0.15.0

bevy_system_ambiguity.rs

use bevy::{
    ecs::schedule::{LogLevel, ScheduleBuildSettings},
    prelude::*,
};

fn main() -> AppExit {
    let mut app = App::new();

    // ...

    app.edit_schedule(Main, |s| {
        s.set_build_settings(ScheduleBuildSettings {
            ambiguity_detection: LogLevel::Warn,
            ..Default::default()
        });
    });

    // ...

    app.run()
}