/** General-purpose references to the different request lifecycle phases. */
export const REQUEST_PHASE_STEER: unique symbol;
export const REQUEST_PHASE_SANITISE: unique symbol;
export const REQUEST_PHASE_GATHER: unique symbol;
export const REQUEST_PHASE_VALIDATE: unique symbol;
export const REQUEST_PHASE_REDIRECT: unique symbol;
export const REQUEST_PHASE_RENDER: unique symbol;
export const CONFIG_ERROR_VISIBILITY_ONSUBMIT: unique symbol;
export const CONFIG_ERROR_VISIBILITY_ALWAYS: unique symbol;