Function createIndexSignature

test/fixtures/snapshot/typescript.js:23486–23492

(decorators, modifiers, parameters, type)

        }
        // @api
        function createIndexSignature(decorators, modifiers, parameters, type) {
            var node = createBaseSignatureDeclaration(176 /* SyntaxKind.IndexSignature */, decorators, modifiers, 
            /*name*/ undefined, 
            /*typeParameters*/ undefined, parameters, type);
            node.transformFlags = 1 /* TransformFlags.ContainsTypeScript */;
            return node;
        }
        // @api
        function updateIndexSignature(node, decorators, modifiers, parameters, type) {
            return node.parameters !== parameters