Function parseMappedTypeParameter

test/fixtures/snapshot/typescript.js:33784–33790

()

            return token() === 22 /* SyntaxKind.OpenBracketToken */ && nextTokenIsIdentifier() && nextToken() === 101 /* SyntaxKind.InKeyword */;
        }
        function parseMappedTypeParameter() {
            var pos = getNodePos();
            var name = parseIdentifierName();
            parseExpected(101 /* SyntaxKind.InKeyword */);
            var type = parseType();
            return finishNode(factory.createTypeParameterDeclaration(/*modifiers*/ undefined, name, type, /*defaultType*/ undefined), pos);
        }
        function parseMappedType() {
            var pos = getNodePos();
            parseExpected(18 /* SyntaxKind.OpenBraceToken */);