use iohidmanager::prelude::*;
fn main() -> Result<(), Box<dyn std::error::Error>> {
let manager = HidManager::new()?;
manager.set_device_matching(None)?;
manager.set_input_value_matching(None)?;
manager.set_input_value_matching_multiple(&[])?;
println!("manager currently sees {} devices", manager.devices().len());
Ok(())
}