public boolean isService(Class<?> serviceInterface) {
		for (Class<?> serviceClass : servicesByInterface.keySet()) {
			if (serviceClass.equals(serviceInterface)) {
				return true;
			}
		}
		return false;
	}
Returns true if the specified <code>serviceInterface</code>
is a valid service that exists in this service manager.
@param serviceInterface the service interface
@return true if the specified <code>serviceInterface</code>
Ghidra/Framework/Project/src/main/java/ghidra/framework/plugintool/mgr/ServiceManager.java