@Override
    default GrpcChannelConfigurer andThen(final BiConsumer<? super ManagedChannelBuilder<?>, ? super String> after) {
        requireNonNull(after, "after");
        return (l, r) -> {
            accept(l, r);
            after.accept(l, r);
        };
    }
A configurer for {@link ManagedChannelBuilder}s which can be used by {@link GrpcChannelFactory} to customize the
created channels.

@author Daniel Theuke (daniel.theuke@heuboe.de)
grpc-client-spring-boot-starter/src/main/java/net/devh/boot/grpc/client/channelfactory/GrpcChannelConfigurer.java