public static long memorySize2Byte(final long memorySize, @MemoryConst.Unit final int unit) {
        if (memorySize < 0) return -1;
        return memorySize * unit;
    }
@Test
    public void memorySize2ByteInputNegativeZeroOutputNegative() {
        Assert.assertEquals(
                -1L,
                ConvertKit.memorySize2Byte(-9_223_372_036_854_775_807L, 0)
        );
    }