@Nonnull
	public static String replaceRange(@Nonnull String string, int start, int end, String replacement) {
		String temp = string.substring(0, start);
		temp += replacement;
		temp += string.substring(end);
		return temp;
	}
@Test
	void testReplaceRange() {
		assertEquals("_cdefg", StringUtil.replaceRange("abcdefg", 0, 2, "_"));
	}