pkg/docgen: refactoring and cleanup

pkg/docgen/lib/src/models.dart

Index: pkg/docgen/lib/src/models.dart
diff --git a/pkg/docgen/lib/src/models.dart b/pkg/docgen/lib/src/models.dart
new file mode 100644
index 0000000000000000000000000000000000000000..5806fb1e374be30bf26152d73ec8b9e4c17dbd79
--- /dev/null
+++ b/pkg/docgen/lib/src/models.dart
@@ -0,0 +1,24 @@
+library docgen.models;
+
+import '../../../../sdk/lib/_internal/compiler/implementation/mirrors/source_mirrors.dart';
+import '../../../../sdk/lib/_internal/compiler/implementation/mirrors/mirrors_util.dart'
+    as dart2js_util;
+
+/// Docgen representation of an item to be documented, that wraps around a
+/// dart2js mirror.
+abstract class MirrorBased {
+  /// The original dart2js mirror around which this object wraps.
+  DeclarationMirror get mirror;
+}
+
+/// A Docgen wrapper around the dart2js mirror for a generic type.
+class Generic extends MirrorBased {
+  final TypeVariableMirror mirror;
+
+  Generic(this.mirror);
+
+  Map toMap() => {
+    'name': dart2js_util.nameOf(mirror),
+    'type': dart2js_util.qualifiedNameOf(mirror.upperBound)
+  };
+}