*/
    public static final int ATTR_SYSTEM     = 0x04;
/**
 * A file with this bit on as returned by <tt>getAttributes()</tt> is
 * a volume
 */
    public static final int ATTR_VOLUME     = 0x08;
/**
 * A file with this bit on as returned by <tt>getAttributes()</tt> is
 * a directory
 */
    public static final int ATTR_DIRECTORY  = 0x10;
/**

    assertFailsWith<IllegalArgumentException> {
      Request.Builder().addHeader("a b", "c")
    }.also { expected ->
      assertThat(expected.message).isEqualTo("Unexpected char 0x20 at 1 in header name: a b")
    }
  }

  @Test
  fun requestHeaderNameWithTabForbidden() {
    assertFailsWith<IllegalArgumentException> {
      Request.Builder().addHeader("a\tb", "c")