@Bean("mixedStub")
        public TestServiceGrpc.TestServiceBlockingStub mixedStub() {
            return this.stub;
        }
Test case covering probable conflicting situations with {@link GrpcClientBean} and {@link GrpcClient} usage.
tests/src/test/java/net/devh/boot/grpc/test/inject/GrpcClientBeanInjectionNegativeTest.java