chronos/src/main/java/com/redmadrobot/chronos/RunningOperationStorage.java
@Contract(pure = true)
    synchronized final boolean isOperationCancelled(final int id) {
        return mCancelledOperations.contains(Integer.valueOf(id));
    }
@Contract(pure = true)
    synchronized final boolean isOperationCancelled(final int id) {
        return mCancelledOperations.contains(Integer.valueOf(id));
    }
Checks if operation launch with given id was cancelled.

@param id the unique id of operations' launch
@return {@code true} if the operation was cancelled, {@code false} otherwise