protected Map<String, ClientInterceptor> getClientInterceptorBeans() {
        return transformValues(this.applicationContext.getBeansWithAnnotation(GrpcGlobalClientInterceptor.class),
                ClientInterceptor.class::cast);
    }
Helper method used to get the {@link GrpcGlobalClientInterceptor} annotated {@link ClientInterceptor}s from the
application context.

@return A map containing the global interceptor beans.
grpc-client-spring-boot-starter/src/main/java/net/devh/boot/grpc/client/interceptor/AnnotationGlobalClientInterceptorConfigurer.java