Method is_playing

examples/sampler_test/src/system.rs:175–180

(&self, sampler_i: usize)

    }

    pub fn is_playing(&self, sampler_i: usize) -> bool {
        self.cx
            .node_state::<SamplerState>(self.samplers[sampler_i].node_id)
            .unwrap()
            .currently_playing()
    }

    pub fn is_paused(&self, sampler_i: usize) -> bool {
        self.cx