fn unpark_thread(&self) -> bool {
        trace!("parked_threads: len is {}", self.parked_threads.len());
        if let Some(thread) = self.parked_threads.pop() {
            debug!("Executor: unpark_thread: unparking {:?}", thread.id());
            thread.unpark();
            true
        } else {
            false
        }
    }
/// Pops a thread from the parked_threads queue and unparks it.
/// returns true on success.
Pops a thread from the parked_threads queue and unparks it.
returns true on success.
Pops a thread from the parked_threads queue and unparks it . returns true on success .
fn unpark_thread(&self) -> bool {
        trace!("parked_threads: len is {}", self.parked_threads.len());
        if let Some(thread) = self.parked_threads.pop() {
            debug!("Executor: unpark_thread: unparking {:?}", thread.id());
            thread.unpark();
            true
        } else {
            false
        }
    }
fn unpark_thread ( & self ) -> bool { trace ! ( " " self parked_threads len ( ) ) ; if let Some ( thread ) = self . parked_threads . pop ( ) { debug ! ( " " thread id ( ) ) ; thread . unpark ( ) ; true } else { false } }
Pops a thread from the parked_threads queue and unparks it.
Pops a thread from the parked_threads queue and unparks it .
&self
&self