import type { Theme } from '@mui/material';
export declare function transform<T>(obj: Record<string, T>, cb: (arg0: [string, T]) => [string, T]): {
    [k: string]: T;
};
export declare function colorContrast(colorScheme: Record<string, string>, theme: Theme): {
    [k: string]: string;
};
export declare function skipBlanks(blanks: number[], str: string): string;
export declare function len(a: {
    end: number;
    start: number;
}): number;
export declare function isBlank(s?: string): s is "-" | ".";