I want to use a static NSMutableDictionary. Can you help how to use static NSMutableDictionary in a class.
Is it correct? .h file
+(NSMutableDictionary*)contactsToAssignBill; +(void)setContactsToAssignBill:(NSMutableDictionary*)value; 
.m file
 static NSMutableDictionary * contactsToAssignBill; +(NSMutableDictionary*)contactsToAssignBill { if (!contactsToAssignBill) contactsToAssignBill = [[NSMutableDictionary alloc] init]; return contactsToAssignBill; } +(void)setContactsToAssignBill:(NSMutableDictionary *)value { if(contactsToAssignBill != value) { [contactsToAssignBill release]; contactsToAssignBill = [value mutableCopy]; } } 
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