How to use the @stylable/core.cachedProcessFile function in @stylable/core

export function generateInfra(
    config: InfraConfig,
    diagnostics: Diagnostics = new Diagnostics()
): {
    resolver: StylableResolver;
    requireModule: RequireType;
    fileProcessor: FileProcessor;
} {
    const { fs, requireModule } = createMinimalFS(config);

    const fileProcessor = cachedProcessFile(
        (from, content) => {
            const meta = process(postcss.parse(content, { from }), diagnostics);
            meta.namespace = config.files[from].namespace || meta.namespace;
            return meta;
        },
        fs,
        x => x
    );

    const resolver = new StylableResolver(fileProcessor, requireModule);

    return { resolver, requireModule, fileProcessor };
}