kv_operation_get_key()
#include <kvstore.h>
const kv_key_t *
kv_operation_get_key(const kv_operations_t *operations,
                     kv_int_t index) Returns the key associated with the operation. If the index parameter is out of range, this function returns NULL.
Parameters
- 
                        operations The operations parameter is the operation sequence to which the operation in question belongs. 
- 
                        index The index parameter identifies the exact operation in the sequence that you want to examine.