How to use the @ngrx/store-devtools/schematics-core/utility/ast-utils.insertImport function in @ngrx/store-devtools

const text = host.read(modulePath);
            if (text === null) {
                throw new schematics_1.SchematicsException(`File ${modulePath} does not exist.`);
            }
            const sourceText = text.toString('utf-8');
            const source = ts.createSourceFile(modulePath, sourceText, ts.ScriptTarget.Latest, true);
            const commonImports = [
                ast_utils_1.insertImport(source, modulePath, 'StoreModule', '@ngrx/store'),
            ];
            const reducerPath = `/${options.path}/` +
                (options.flat ? '' : stringUtils.dasherize(options.name) + '/') +
                (options.group ? 'reducers/' : '') +
                stringUtils.dasherize(options.name) +
                '.reducer';
            const relativePath = find_module_1.buildRelativePath(modulePath, reducerPath);
            const reducerImport = ast_utils_1.insertImport(source, modulePath, `* as from${stringUtils.classify(options.name)}`, relativePath, true);
            const [storeNgModuleImport] = ast_utils_1.addImportToModule(source, modulePath, `StoreModule.forFeature('${stringUtils.camelize(options.name)}', from${stringUtils.classify(options.name)}.reducer)`, relativePath);
            const changes = [...commonImports, reducerImport, storeNgModuleImport];
            const recorder = host.beginUpdate(modulePath);
            for (const change of changes) {
                if (change instanceof change_1.InsertChange) {
                    recorder.insertLeft(change.pos, change.toAdd);
                }
            }
            host.commitUpdate(recorder);
            return host;
        };
    }

return (host) => {
            if (!options.module) {
                return host;
            }
            const modulePath = options.module;
            if (!host.exists(options.module)) {
                throw new Error(`Specified module path ${modulePath} does not exist`);
            }
            const text = host.read(modulePath);
            if (text === null) {
                throw new schematics_1.SchematicsException(`File ${modulePath} does not exist.`);
            }
            const sourceText = text.toString('utf-8');
            const source = ts.createSourceFile(modulePath, sourceText, ts.ScriptTarget.Latest, true);
            const commonImports = [
                ast_utils_1.insertImport(source, modulePath, 'StoreModule', '@ngrx/store'),
            ];
            const reducerPath = `/${options.path}/` +
                (options.flat ? '' : stringUtils.dasherize(options.name) + '/') +
                (options.group ? 'reducers/' : '') +
                stringUtils.dasherize(options.name) +
                '.reducer';
            const relativePath = find_module_1.buildRelativePath(modulePath, reducerPath);
            const reducerImport = ast_utils_1.insertImport(source, modulePath, `* as from${stringUtils.classify(options.name)}`, relativePath, true);
            const [storeNgModuleImport] = ast_utils_1.addImportToModule(source, modulePath, `StoreModule.forFeature('${stringUtils.camelize(options.name)}', from${stringUtils.classify(options.name)}.reducer)`, relativePath);
            const changes = [...commonImports, reducerImport, storeNgModuleImport];
            const recorder = host.beginUpdate(modulePath);
            for (const change of changes) {
                if (change instanceof change_1.InsertChange) {
                    recorder.insertLeft(change.pos, change.toAdd);
                }
            }

if (!host.exists(reducersPath)) {
                throw new Error(`Specified reducers path ${reducersPath} does not exist`);
            }
            const text = host.read(reducersPath);
            if (text === null) {
                throw new schematics_1.SchematicsException(`File ${reducersPath} does not exist.`);
            }
            const sourceText = text.toString('utf-8');
            const source = ts.createSourceFile(reducersPath, sourceText, ts.ScriptTarget.Latest, true);
            const reducerPath = `/${options.path}/` +
                (options.flat ? '' : stringUtils.dasherize(options.name) + '/') +
                (options.group ? 'reducers/' : '') +
                stringUtils.dasherize(options.name) +
                '.reducer';
            const relativePath = find_module_1.buildRelativePath(reducersPath, reducerPath);
            const reducerImport = ast_utils_1.insertImport(source, reducersPath, `* as from${stringUtils.classify(options.name)}`, relativePath, true);
            const stateInterfaceInsert = addReducerToStateInterface(source, reducersPath, options);
            const reducerMapInsert = addReducerToActionReducerMap(source, reducersPath, options);
            const changes = [reducerImport, stateInterfaceInsert, reducerMapInsert];
            const recorder = host.beginUpdate(reducersPath);
            for (const change of changes) {
                if (change instanceof change_1.InsertChange) {
                    recorder.insertLeft(change.pos, change.toAdd);
                }
            }
            host.commitUpdate(recorder);
            return host;
        };
    }