/** An approval operation that is being proposed or persisted. */
export type ApprovalAction='approve'|'deny';
/** The final outcome of an approval operation. */
export type ApprovalDecision='approved'|'denied';
/** Converts an imperative pending action into its committed decision value. */
export declare function approvalDecision(action:ApprovalAction):ApprovalDecision;
/** Converts a committed decision into the action that produced it. */
export declare function approvalAction(decision:ApprovalDecision):ApprovalAction;