export declare function motionEaseVariableName(ease: string): string | null;
export declare function isMotionEaseVariableReference(ease: string): boolean;
/** True only for timing functions accepted by the Motion authoring model. */
export declare function isValidMotionEase(ease: string): boolean;
/** Resolves Motion variables and spring tokens to easing strings accepted by WAAPI. */
export declare function resolveMotionEaseForWebAnimations(ease: string, readCssVariable: (name: string) => string): string;