different attempt to parse using collapsable text

ranges

langserver/java/validation/multiple-package-decls.js

@@ -0,0 +1,13 @@
+const { ModuleBlock } = require('./../parser9');
+const ParseProblem = require('./../parsetypes/parse-problem');
+
+/**
+ * @param {ModuleBlock} mod 
+ */
+module.exports = function(mod) {
+    return mod.packages.slice(1).map(
+        pkg => {
+            return ParseProblem.Error(pkg, 'Additional package declaration');
+        }
+    )
+}