CSSMERR_CSSM_EVENT_NOTIFICATION_CALLBACK_NOT_FOUND

objc2_security

Constant CSSMERR_CSSM_EVENT_NOTIFICATION_CALLBACK_NOT_FOUND 

Source 
pub const CSSMERR_CSSM_EVENT_NOTIFICATION_CALLBACK_NOT_FOUND: c_int = -2147417819;
Available on crate feature cssmerr only.
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Apple’s documentation