+/** @brief Remove the provided value from the cell #name in #cfg. */
+XBT_PUBLIC(void) xbt_cfg_rm_int(xbt_cfg_t cfg, const char *name, int val);
+XBT_PUBLIC(void) xbt_cfg_rm_double(xbt_cfg_t cfg, const char *name, double val);
+XBT_PUBLIC(void) xbt_cfg_rm_string(xbt_cfg_t cfg, const char *name, const char *val);
+XBT_PUBLIC(void) xbt_cfg_rm_boolean(xbt_cfg_t cfg, const char *name, int val);
+
+/** @brief Remove the value at position \e pos from the config \e cfg */
+XBT_PUBLIC(void) xbt_cfg_rm_at(xbt_cfg_t cfg, const char *name, int pos);
+
+/** @brief rm every values */
+XBT_PUBLIC(void) xbt_cfg_empty(xbt_cfg_t cfg, const char *name);
+
+/** @brief Return if configuration is set by default*/
+XBT_PUBLIC(int) xbt_cfg_is_default_value(xbt_cfg_t cfg, const char *name);