@Override
    public IndexSpecs indexFor(Scheme scheme) {
        var keySpace = getKeySpace(scheme);
        var indexSpecs = new DefaultIndexSpecs();
        useDefaultIndexSpec(scheme.type(), indexSpecs);
        extensionIndexSpecs.put(keySpace, indexSpecs);
        return indexSpecs;
    }
@Test
    void indexFor() {
        var specs = indexSpecRegistry.indexFor(scheme);
        assertThat(specs).isNotNull();
        assertThat(specs.getIndexSpecs()).hasSize(4);
    }