/**
 * If the condition is undefined, returns empty string
 * If truthy and falsy are undefined, returns the condition
 * If only falsy is undefined, returns thuthy or an empty string depending on the condition
 * Otherwise acts as a ternary operator
 */
export declare function safeFallback<C = boolean, T = '', F = undefined, R = F extends undefined ? T | '' : T | F>(condition: C | undefined, truthy?: T, falsy?: F): R;