type MutationFunction = (key: string, value: any, data: any) => any;
interface MergeOptions {
    mutation: MutationFunction;
    ommit?: string[];
    data?: any;
}
interface ConfigOptions {
    fix?: (target: any, source: any) => any;
}
interface TransformOptions {
    beforeFunc?: (context: Context) => any;
    duringFunc?: (context: Context) => any;
    afterFunc?: (context: Context) => any;
    nonObjectFunc?: (context: Context) => any;
    filter?: string | string[] | ((context: Context) => boolean);
    key?: string;
    root?: any;
}
interface Context {
    input: any;
    key: string | null;
    parentObj: any;
    parentKey: string | null;
    path: string;
}
/**
 * Execute a mutation function on the object and merge results.
 * @param target - The target object to be merged with mutation.
 * @param options - Options for mutation, ommit keys and additional data.
 * @param parentKey - Internal tracking key for recursion.
 * @returns The mutated and merged target object.
 */
export declare function mergeWithMutation(target: any, { mutation, ommit, data }: MergeOptions, parentKey?: string): Promise<any>;
/**
 * Deep merge multiple objects.
 * @param target - The target object where other objects will be merged.
 * @param sources - Other objects to be merged into the target.
 * @returns The merged object.
 */
export declare function deepMerge(target: any, ...sources: any[]): any;
export declare namespace deepMerge {
    var setConfig: (config: ConfigOptions) => void;
}
/**
 * Transforms and flattens a JSON object.
 *
 * @param json - The JSON object to be transformed.
 * @param options - Options for the mutation functions.
 * @returns An array with the modified object and the flattened object.
 */
export declare function transformJson(json: any, options?: TransformOptions): [any, any];
export {};