How to use the @loopback/metadata.MetadataInspector.getMethodMetadata function in @loopback/metadata

loadInterceptors() {
    let interceptors =
      MetadataInspector.getMethodMetadata(
        INTERCEPT_METHOD_KEY,
        this.target,
        this.methodName,
      ) ?? [];
    const targetClass =
      typeof this.target === 'function' ? this.target : this.target.constructor;
    const classInterceptors =
      MetadataInspector.getClassMetadata(INTERCEPT_CLASS_KEY, targetClass) ??
      [];
    // Inserting class level interceptors before method level ones
    interceptors = mergeInterceptors(classInterceptors, interceptors);
    const globalInterceptors = this.getGlobalInterceptorBindingKeys();
    // Inserting global interceptors
    interceptors = mergeInterceptors(globalInterceptors, interceptors);
    debug('Interceptors for %s', this.targetName, interceptors);
    return interceptors;