Function CFDictionaryCreateMutableCopy 

pub unsafe extern "C-unwind" fn CFDictionaryCreateMutableCopy(
    allocator: Option<&CFAllocator>,
    capacity: CFIndex,
    the_dict: Option<&CFDictionary>,
) -> Option<CFRetained<CFMutableDictionary>>

👎Deprecated: renamed to CFMutableDictionary::new_copy

Available on crate feature CFDictionary only.