public final GrpcChannelProperties getGlobalChannel() {
        // This cannot be moved to its own field,
        // as Spring replaces the instance in the map and inconsistencies would occur.
        return getRawChannel(GLOBAL_PROPERTIES_KEY);
    }
Gets the global channel properties. Global properties are used, if the channel properties don't overwrite them.
If neither the global nor the per client properties are set then default values will be used.

@return The global channel properties.
grpc-client-spring-boot-starter/src/main/java/net/devh/boot/grpc/client/config/GrpcChannelsProperties.java