Function parseOptionalJsdoc

test/fixtures/snapshot/typescript.js:38299–38305

(t)

                    return finishNode(factory.createJSDocTemplateTag(tagName, constraint, typeParameters, parseTrailingTagComments(start, getNodePos(), indent, indentText)), start);
                }
                function parseOptionalJsdoc(t) {
                    if (token() === t) {
                        nextTokenJSDoc();
                        return true;
                    }
                    return false;
                }
                function parseJSDocEntityName() {
                    var entity = parseJSDocIdentifierName();
                    if (parseOptional(22 /* SyntaxKind.OpenBracketToken */)) {