Move function for scoping purposes

MVMCoreUI/Behaviors/Protocols/PageBehaviorHandlerModelProtocol.swift

@@ -23,3 +23,19 @@ public extension PageBehaviorHandlerModelProtocol {
         self.behaviors = newBehaviors
     }
 }
+
+public extension PageBehaviorHandlerModelProtocol where Self: MoleculeTreeTraversalProtocol {
+    
+    /// Traverses all models and adds any required behavior models.
+    mutating func traverseAndAddRequiredBehaviors() {
+        let behaviorModels: [PageBehaviorModelProtocol] = reduceDepthFirstTraverse(options: .childFirst, depth: 0, initialResult: []) { (accumulator, molecule, depth) in
+            if let behaviorRequirer = molecule as? PageBehaviorProtocolRequirer {
+                return accumulator + behaviorRequirer.getRequiredBehaviors()
+            }
+            return accumulator
+        }
+        for behavior in behaviorModels {
+            add(behavior: behavior)
+        }
+    }
+}