System/Library/PrivateFrameworks/Email.framework
EMActivityObjectID.h
@interface EMActivityObjectID : EMObjectID
+ (BOOL)supportsSecureCoding;
- (id)init;
- (void)encodeWithCoder:(id)a0;
- (id)initWithCoder:(id)a0;
@end
System/Library/PrivateFrameworks/Email.framework
@interface EMActivityObjectID : EMObjectID
+ (BOOL)supportsSecureCoding;
- (id)init;
- (void)encodeWithCoder:(id)a0;
- (id)initWithCoder:(id)a0;
@end