change approach again

node_modules/command-line-args/lib/grouped-output.js

@@ -0,0 +1,35 @@
+'use strict'
+const arrayify = require('array-back')
+const Output = require('./output')
+
+class GroupedOutput extends Output {
+  toObject () {
+    const superOutput = super.toObject()
+    delete superOutput._unknown
+    const grouped = {
+      _all: superOutput
+    }
+    if (this.unknown.length) grouped._unknown = this.unknown
+
+    this.definitions.whereGrouped().forEach(def => {
+      const outputValue = this.output[def.name]
+      for (const groupName of arrayify(def.group)) {
+        grouped[groupName] = grouped[groupName] || {}
+        if (outputValue && outputValue.isDefined()) {
+          grouped[groupName][def.name] = outputValue.value
+        }
+      }
+    })
+
+    this.definitions.whereNotGrouped().forEach(def => {
+      const outputValue = this.output[def.name]
+      if (outputValue && outputValue.isDefined()) {
+        if (!grouped._none) grouped._none = {}
+        grouped._none[def.name] = outputValue.value
+      }
+    })
+    return grouped
+  }
+}
+
+module.exports = GroupedOutput