public static String ltrim( String source ) {
    if ( source == null ) {
      return null;
    }
    int from = 0;
    while ( from < source.length() && isSpace( source.charAt( from ) ) ) {
      from++;
    }

    return source.substring( from );
  }
@Test
  public void testLtrim() {
    assertEquals( null, Const.ltrim( null ) );
    assertEquals( "", Const.ltrim( "" ) );
    assertEquals( "", Const.ltrim( "  " ) );
    assertEquals( "test ", Const.ltrim( "test " ) );
    assertEquals( "test ", Const.ltrim( "  test " ) );
  }