export declare const buttonBaseVariants: (props?: ({
    size?: "small" | "medium" | "large" | null | undefined;
    iconOnly?: boolean | null | undefined;
    loading?: boolean | null | undefined;
    hasNonTextEnd?: boolean | null | undefined;
    fullWidth?: boolean | null | undefined;
} & import("class-variance-authority/types").ClassProp) | undefined) => string;