public static String minusToCamel(String param) {
        return formatCamel(param, MINUS);
    }
@Test
    void minusToCamel() {
        assertThat(StringFormatUtils.minusToCamel(null)).isEqualTo("");
        assertThat(StringFormatUtils.minusToCamel("  ")).isEqualTo("");
        assertThat(StringFormatUtils.minusToCamel("abc-def-gh")).isEqualTo("abcDefGh");
    }