Function SzConfigMgr_getConfigRegistry 

pub unsafe extern "C" fn SzConfigMgr_getConfigRegistry(
    responseBuf: *mut *mut c_char,
    bufSize: *mut usize,
    resizeFunc: Option<unsafe extern "C" fn(ptr: *mut c_void, newSize: usize) -> *mut c_void>,
) -> i64

@brief Retrieve a list of configurations from the backend data store