126     ast.walk(new TreeWalker(function(node) {  argument
127         if (node instanceof AST_ClassProperty
128             || node instanceof AST_DestructuredKeyVal
129             || node instanceof AST_ObjectProperty) {
130             if (node.key instanceof AST_Node) {
131                 addStrings(node.key, add);
132             } else if (node.start && node.start.quote) {
133                 add(node.key);
135         } else if (node instanceof AST_Dot) {
136             if (node.quoted) add(node.property);
137         } else if (node instanceof AST_Sub) {
138             addStrings(node.property, add);
147 function addStrings(node, add) {  argument
148     if (node instanceof AST_Conditional) {
149         addStrings(node.consequent, add);
150         addStrings(node.alternative, add);
151     } else if (node instanceof AST_Sequence) {
152         addStrings(node.tail_node(), add);
153     } else if (node instanceof AST_String) {
154         add(node.value);
201     ast.walk(new TreeWalker(function(node) {  argument
202         if (node.TYPE == "Call") {
203             var exp = node.expression;
207                 if (node.args.length < 2) break;
212                 addStrings(node.args[1], add);
215                 if (node.args.length < 1) break;
216                 addStrings(node.args[0], add);
219         } else if (node instanceof AST_ClassProperty
220             || node instanceof AST_DestructuredKeyVal
221             || node instanceof AST_ObjectProperty) {
222             if (node.key instanceof AST_Node) {
223                 addStrings(node.key, add);
225                 add(node.key);
227         } else if (node instanceof AST_Dot) {
228             if (is_lhs(node, this.parent())) add(node.property);
229         } else if (node instanceof AST_Sub) {
230             if (is_lhs(node, this.parent())) addStrings(node.property, add);
235     ast.walk(new TreeWalker(function(node) {  argument
236         if (node instanceof AST_Binary) {
237             if (node.operator == "in") mangleStrings(node.left);
238         } else if (node.TYPE == "Call") {
239             var exp = node.expression;
243                 if (node.args.length < 2) break;
248                 mangleStrings(node.args[1]);
251                 if (node.args.length < 1) break;
252                 mangleStrings(node.args[0]);
255         } else if (node instanceof AST_ClassProperty
256             || node instanceof AST_DestructuredKeyVal
257             || node instanceof AST_ObjectProperty) {
258             if (node.key instanceof AST_Node) {
259                 mangleStrings(node.key);
261                 node.key = mangle(node.key);
263         } else if (node instanceof AST_Dot) {
264             node.property = mangle(node.property);
265         } else if (node instanceof AST_Sub) {
266             if (!options.keep_quoted) mangleStrings(node.property);
318     function mangleStrings(node) {  argument
319         if (node instanceof AST_Sequence) {
320             mangleStrings(node.tail_node());
321         } else if (node instanceof AST_String) {
322             node.value = mangle(node.value);
323         } else if (node instanceof AST_Conditional) {
324             mangleStrings(node.consequent);
325             mangleStrings(node.alternative);