ClassLoader connectorLoader(String connectorClassOrAlias) {
        String fullName = aliases.getOrDefault(connectorClassOrAlias, connectorClassOrAlias);
        ClassLoader classLoader = pluginClassLoader(fullName);
        if (classLoader == null) classLoader = this;
        log.debug(
            "Getting plugin class loader: '{}' for connector: {}",
            classLoader,
            connectorClassOrAlias
        );
        return classLoader;
    }
@Test
    public void testEmptyConnectorLoader() {
        assertSame(classLoader, classLoader.connectorLoader(ARBITRARY));
    }