Function createPropertySignature

test/fixtures/snapshot/typescript.js:23280–23287

(modifiers, name, questionToken, type)

        //
        // @api
        function createPropertySignature(modifiers, name, questionToken, type) {
            var node = createBaseNamedDeclaration(166 /* SyntaxKind.PropertySignature */, 
            /*decorators*/ undefined, modifiers, name);
            node.type = type;
            node.questionToken = questionToken;
            node.transformFlags = 1 /* TransformFlags.ContainsTypeScript */;
            return node;
        }
        // @api
        function updatePropertySignature(node, modifiers, name, questionToken, type) {
            return node.modifiers !== modifiers