First commit.

Signed-off-by: Chen Xiao <abigwc@gmail.com>

client/node_modules/langium/lib/documentation/comment-provider.d.ts

@@ -0,0 +1,25 @@
+/******************************************************************************
+ * Copyright 2023 TypeFox GmbH
+ * This program and the accompanying materials are made available under the
+ * terms of the MIT License, which is available in the project root.
+ ******************************************************************************/
+import type { GrammarConfig } from '../languages/grammar-config.js';
+import type { LangiumCoreServices } from '../services.js';
+import type { AstNode } from '../syntax-tree.js';
+/**
+ * Provides comments for AST nodes.
+ */
+export interface CommentProvider {
+    /**
+     * Returns the comment associated with the specified AST node.
+     * @param node The AST node to get the comment for.
+     * @returns The comment associated with the specified AST node or `undefined` if there is no comment.
+     */
+    getComment(node: AstNode): string | undefined;
+}
+export declare class DefaultCommentProvider implements CommentProvider {
+    protected readonly grammarConfig: () => GrammarConfig;
+    constructor(services: LangiumCoreServices);
+    getComment(node: AstNode): string | undefined;
+}
+//# sourceMappingURL=comment-provider.d.ts.map