int connman_provider_set_string(struct connman_provider *provider,
const char *key, const char *value);
const char *connman_provider_get_string(struct connman_provider *provider,
int connman_provider_set_string(struct connman_provider *provider,
const char *key, const char *value);
const char *connman_provider_get_string(struct connman_provider *provider,