/**
 * Prints an error when explicitly requested matrix files cannot be found.
 * @param missing File names that do not exist relative to cwd.
 * @returns void
 */
export declare function printMatrixMissingFiles(missing: string[]): void;
/**
 * Prints an error when fewer than two files are available to compare.
 * @param count Number of files found.
 * @returns void
 */
export declare function printMatrixInsufficientFiles(count: number): void;
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