import { AxiosError } from 'axios';
export declare class RedmineError extends Error {
    statusCode?: number | undefined;
    errors?: string[] | undefined;
    constructor(message: string, statusCode?: number | undefined, errors?: string[] | undefined);
}
export declare class ConfigurationError extends Error {
    constructor(message: string);
}
export declare class ValidationError extends Error {
    field?: string | undefined;
    constructor(message: string, field?: string | undefined);
}
export declare function handleAxiosError(error: AxiosError): never;
export declare function formatErrorResponse(error: unknown): string;
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