Silenced nullability warnings in Functions iOS implementation.

PiperOrigin-RevId: 264719988

Author: smiles

functions/src/ios/callable_reference_ios.h

@@ -36,6 +36,8 @@ class Variant;
 namespace functions {
 namespace internal {
 
+#pragma clang assume_nonnull begin
+
 class HttpsCallableReferenceInternal {
  public:
   explicit HttpsCallableReferenceInternal(FunctionsInternal* functions,
@@ -92,6 +94,8 @@ class HttpsCallableReferenceInternal {
   Mutex controller_init_mutex_;
 };
 
+#pragma clang assume_nonnull end
+
 }  // namespace internal
 }  // namespace functions
 }  // namespace firebase

functions/src/ios/functions_ios.h

@@ -34,6 +34,8 @@
 // around the FIRFunctions Obj-C class.
 OBJ_C_PTR_WRAPPER(FIRFunctions);
 
+#pragma clang assume_nonnull begin
+
 namespace firebase {
 namespace functions {
 namespace internal {
@@ -78,6 +80,8 @@ class FunctionsInternal {
   CleanupNotifier cleanup_;
 };
 
+#pragma clang assume_nonnull end
+
 }  // namespace internal
 }  // namespace functions
 }  // namespace firebase