/** trim source for test comparisons
 * rm blank lines at beginning and end of string (but not interior blank lines)
 * rm leading indent consistently across remaining lines
 * rm trailing spaces from each line */
export declare function trimSrc(src: string): string;
export declare function dropWhile<T>(a: T[], fn: (el: T) => boolean): T[];
export declare function dropRightWhile<T>(a: T[], fn: (el: T) => boolean): T[];