function createDefaultTracingSpan() {
    return {
        end: () => {
            // noop
        },
        isRecording: () => false,
        recordException: () => {
            // noop
        },
        setAttribute: () => {
            // noop
        },
        setStatus: () => {
            // noop
        },
        addEvent: () => {
            // noop
        },
    };
}
Gets the currently set instrumenter, a No-Op instrumenter by default.

@returns The currently set instrumenter