denoland-deno/cli/tests/lsp/signature_help_did_open_notification.json

{
  "jsonrpc": "2.0",
  "method": "textDocument/didOpen",
  "params": {
    "textDocument": {
      "uri": "file:///a/file.ts",
      "languageId": "typescript",
      "version": 1,
      "text": "/**\n * Adds two numbers.\n * @param a This is a first number.\n * @param b This is a second number.\n */\nfunction add(a: number, b: number) {\n  return a + b;\n}\n\nadd("
    }
  }
}