/**
 * Make an assertion that `actual` is less than or equal to `expected`.
 * If not then throw.
 *
 * @example Usage
 * ```ts ignore
 * import { assertLessOrEqual } from "mod.ts";
 *
 * assertLessOrEqual(1, 2); // Doesn't throw
 * assertLessOrEqual(1, 1); // Doesn't throw
 * assertLessOrEqual(1, 0); // Throws
 * ```
 *
 * @typeParam T The type of the values to compare.
 * @param actual The actual value to compare.
 * @param expected The expected value to compare.
 * @param msg The optional message to display if the assertion fails.
 */
export declare function assertLessOrEqual<T>(
  actual: T,
  expected: T,
  msg?: string,
): void;