function parseJSDocTypeExpression(start, length) {
                scanner.setText(sourceText, start, length);
                // Prime the first token for us to start processing.
                token = nextToken();
                var result = createNode(249 /* JSDocTypeExpression */);
                parseExpected(15 /* OpenBraceToken */);
                result.type = parseJSDocTopLevelType();
                parseExpected(16 /* CloseBraceToken */);
                fixupParentReferences(result);
                return finishNode(result);
            }