diff --git a/MVMCore/MVMCore/Models/Model/ModelProtocol.swift b/MVMCore/MVMCore/Models/Model/ModelProtocol.swift
index cdabef2..ed9f5cf 100644
--- a/MVMCore/MVMCore/Models/Model/ModelProtocol.swift
+++ b/MVMCore/MVMCore/Models/Model/ModelProtocol.swift
@@ -52,7 +52,7 @@ extension ModelProtocol {
 }
 
 public protocol ModelComparisonProtocol {
-    /// Deep checks if the curent model is equal to another model. Defaults to false unless implemented otherwise.
+    /// Shallow checks if the curent model is equal to another model. Defaults to false unless implemented otherwise.
     func isEqual(to model: ModelComparisonProtocol) -> Bool
 }
 
@@ -97,3 +97,15 @@ public extension Optional where Wrapped: Collection {
         return self.isEqual(to: models)
     }
 }
+
+public extension Optional {
+    /// Checks if 
+    func matchExistence(with anotherOptional: Optional) -> Bool {
+        switch(self) {
+        case .none:
+            return anotherOptional == nil
+        case .some(_):
+            return anotherOptional != nil
+        }
+    }
+}
diff --git a/MVMCore/MVMCore/Models/Model/ModelRegistry.swift b/MVMCore/MVMCore/Models/Model/ModelRegistry.swift
index dbb2afa..bd9f721 100644
--- a/MVMCore/MVMCore/Models/Model/ModelRegistry.swift
+++ b/MVMCore/MVMCore/Models/Model/ModelRegistry.swift
@@ -105,7 +105,7 @@ public struct ModelRegistry {
         
         MVMCoreLoggingHandler.shared()?.addError(toLog: errorObject)
         #if DEBUG
-        triggerCrashInDebug()
+        //triggerCrashInDebug()
         #endif
     }