partway through ch15.5

.obsidian/graph.json

@@ -17,6 +17,6 @@
   "repelStrength": 10,
   "linkStrength": 1,
   "linkDistance": 250,
-  "scale": 1.0000000000000013,
+  "scale": 0.8410178518902366,
   "close": false
 }

.obsidian/workspace.json

@@ -35,6 +35,20 @@
               "title": "Smart Pointers"
             }
           },
+          {
+            "id": "74da570aae42b3e7",
+            "type": "leaf",
+            "state": {
+              "type": "markdown",
+              "state": {
+                "file": "Ref Cell Mutability.md",
+                "mode": "source",
+                "source": false
+              },
+              "icon": "lucide-file",
+              "title": "Ref Cell Mutability"
+            }
+          },
           {
             "id": "7615e7dc6a30893a",
             "type": "leaf",
@@ -60,7 +74,7 @@
             }
           }
         ],
-        "currentTab": 3
+        "currentTab": 2
       }
     ],
     "direction": "vertical"
@@ -203,10 +217,11 @@
       "command-palette:Open command palette": false
     }
   },
-  "active": "6ed9f182aa3d5f3e",
+  "active": "74da570aae42b3e7",
   "lastOpenFiles": [
-    "Reference Counter Smart Pointer.md",
     "Smart Pointers.md",
+    "Test Controls.md",
+    "Reference Counter Smart Pointer.md",
     "Ref Cell Mutability.md",
     "The Performance Closures and Iterators.md",
     "Improving The IO Project.md",
@@ -217,7 +232,6 @@
     "Writing_Tests.md",
     "minigrep/src/lib.rs",
     "Test_Organization.md",
-    "Test Controls.md",
     "Traits.md",
     "Modules and Use.md",
     "Modules.md",