not sure if this is the correct way to transform aabb2

lib/src/vector_math/aabb2.dart

@@ -69,6 +69,43 @@ class Aabb2 {
     o._max.setFrom(_max);
   }
 
+  Aabb2 transform(Matrix2 T) {
+    Vector2 center = new Vector2.zero();
+    Vector2 halfExtents = new Vector2.zero();
+    copyCenterAndHalfExtents(center, halfExtents);
+    T.transform(center);
+    T.absolute().transform(halfExtents);
+    _min.setFrom(center);
+    _max.setFrom(center);
+
+    _min.sub(halfExtents);
+    _max.add(halfExtents);
+    return this;
+  }
+
+  Aabb2 rotate(Matrix2 T) {
+    Vector2 center = new Vector2.zero();
+    Vector2 halfExtents = new Vector2.zero();
+    copyCenterAndHalfExtents(center, halfExtents);
+    T.absolute().transform(halfExtents);
+    _min.setFrom(center);
+    _max.setFrom(center);
+
+    _min.sub(halfExtents);
+    _max.add(halfExtents);
+    return this;
+  }
+
+  Aabb2 transformed(Matrix2 T, Aabb2 out) {
+    out.copyFrom(this);
+    return out.transform(T);
+  }
+
+  Aabb2 rotated(Matrix2 T, Aabb2 out) {
+    out.copyFrom(this);
+    return out.rotate(T);
+  }
+
   /// Set the min and max of [this] so that [this] is a hull of [this] and [other].
   void hull(Aabb2 other) {
     min.x = Math.min(_min.x, other.min.x);