public static Cancellable nonCancellable() {
        return NOOP_CANCELLABLE;
    }
Creates a {@link Cancellable} operation handle for an ongoing process
or operation that cannot be cancelled. Attempts to cancel the operation
with this handle will have no effect.

@return the no-op cancellable operation handle.
httpclient5/src/main/java/org/apache/hc/client5/http/impl/Operations.java