export declare function isCssVar(key: string): boolean;
export declare function splitDeclaration(decl: string): {
    key: string;
    value: string;
};
export declare function isJsonLike(value: any): boolean;
export declare function parseJson(strValue: string): {
    theme: string;
    size?: string;
    lineHeight?: string;
    style?: string;
    weight: string;
};
export declare function isNumber(value: any): boolean;
export declare function forEach(obj: Object, iteratee: (value: any, key: any) => void): void;
export declare function pickBy(obj: Object, predicate: (value: any) => boolean): Object;
export declare function parenthesisAreBalanced(str: string): boolean;