private String simpleServiceName() {
        final Class<?> serviceType = serviceType();
        final String fqcn = serviceType.getName();
        final int lastDot = fqcn.lastIndexOf('.');
        return lastDot < 0 ? fqcn : fqcn.substring(lastDot + 1);
    }
Returns the simplified name of the {@link #serviceType()}.
core/src/main/java/com/linecorp/armeria/common/DefaultRpcRequest.java