pub trait TimedValueControlSourceExt: 'static {
fn count(&self) -> i32;
fn set(&self, timestamp: ClockTime, value: f64) -> bool;
fn unset(&self, timestamp: ClockTime) -> bool;
fn unset_all(&self);
fn connect_value_added<F: Fn(&Self, &ControlPoint) + Send + Sync + 'static>(
&self,
f: F
) -> SignalHandlerId;
fn connect_value_changed<F: Fn(&Self, &ControlPoint) + Send + Sync + 'static>(
&self,
f: F
) -> SignalHandlerId;
fn connect_value_removed<F: Fn(&Self, &ControlPoint) + Send + Sync + 'static>(
&self,
f: F
) -> SignalHandlerId;
}