/**
 * BranchDiffHeader Component
 *
 * Header bar for branch merge comparison showing branch names
 * instead of version numbers, along with change count summary.
 */
import React from 'react';
/**
 * Props for the BranchDiffHeader component.
 */
export interface BranchDiffHeaderProps {
    /**
     * Name of the source branch.
     */
    sourceBranchName: string;
    /**
     * Name of the target branch.
     */
    targetBranchName: string;
    /**
     * Number of added components.
     */
    added?: number;
    /**
     * Number of removed components.
     */
    removed?: number;
    /**
     * Number of modified components.
     */
    modified?: number;
    /**
     * Number of reordered components.
     */
    reordered?: number;
    /**
     * Callback when close button is clicked.
     */
    onClose: () => void;
    /**
     * Additional CSS class name.
     */
    className?: string;
}
/**
 * Renders a header bar for branch merge comparison with branch names
 * and change count summary.
 *
 * @param props - {@link BranchDiffHeaderProps}
 * @returns A React element containing branch labels, change badges, and a close button.
 */
export declare function BranchDiffHeader({ sourceBranchName, targetBranchName, added, removed, modified, reordered, onClose, className, }: BranchDiffHeaderProps): React.ReactElement;