Obscure mail spi

App/Hacks/Hacks.m

@@ -6,6 +6,7 @@
 //
 
 #import "Hacks.h"
+#import <objc/runtime.h>
 
 Class DecodedClass(const char *encodedClassName) {
     NSData *data = [NSData dataWithBytesNoCopy:(void *)encodedClassName length:strlen(encodedClassName) freeWhenDone:NO];
@@ -23,3 +24,8 @@ SEL DecodedSelector(const char *encodedSelectorName) {
     return NSSelectorFromString(str);
 }
 
+void SwizzleClassMethod(Class targetClass, SEL originalSelector, IMP replacementIMP)
+{
+    Method originalMethod = class_getClassMethod(targetClass, originalSelector);
+    method_setImplementation(originalMethod, replacementIMP);
+}