How to use the @most/disposable.tryDispose function in @most/disposable

private dispose(t: Time, index: number): void {
    tryDispose(t, this.disposables[index], this.sink)
    if (--this.activeCount === 0) {
      this.sink.end(t)
    }
  }
}

endInner(t: Time, inner: Disposable): void {
    const i = this.current.indexOf(inner)
    if (i >= 0) {
      this.current.splice(i, 1)
    }
    tryDispose(t, inner, this)

    const pending = this.pending
    if (isNonEmpty(pending)) {
      this.startInner(t, pending.shift())
    } else {
      this.checkEnd(t)
    }
  }

error(t: Time, e: E): void {
    const nextSink = this.sink.disable()

    tryDispose(t, this.disposable, this.sink)

    this._startNext(t, e, nextSink)
  }

private dispose(t: Time, index: number): void {
    tryDispose(t, this.disposables[index], this.sink)
    if (--this.activeCount === 0) {
      this.sink.end(t)
    }
  }
}

end(t: Time): void {
    this.active = false
    tryDispose(t, this.disposable, this.sink)
    this.checkEnd(t)
  }

end(t: Time): void {
    if (!this.active) {
      return
    }

    tryDispose(t, this.disposable, this.sink)

    this.startNext(t, this.sink)
  }

dispose(t: Time): void {
    tryDispose(t, this.disposable, this.sink)
  }
}