// Parsing terminated mid-variable.
		return fmt.Errorf("invalid header configuration. Un-terminated variable expression '%s'", headerValue)
	}

	return nil
}

func isSpace(chr byte) bool {
	return chr == ' '

sub ComputeClass($) {
  my @ranges;
  my ($class) = @_;
  my $regexp = "[$class]";
  my $start = -1;
  for (my $i=0; $i<=129; $i++) {
    if ($i == 129) { $i = 256; }
    if ($i <= 128 && ($overrides{"$class:$i"} // chr($i) =~ $regexp)) {
      if ($start < 0) {
        $start = $i;
      }
    } else {
      if ($start >= 0) {
        push @ranges, [$start, $i-1];
      }
      $start = -1;
    }
  }
  return @ranges;

        if (isEmpty(s)) {
            return false;
        }

        final int size = s.length();
        for (int i = 0; i < size; i++) {
            final char chr = s.charAt(i);
            if (chr < '0' || '9' < chr) {
                return false;
            }
        }

        return true;
    }

    /**
     * 引数の文字列を返します。引数の文字列が<code>null</code>だったら空文字を返します。
     * <p>

					i, vals, names[i], i)
			} else {
				// Normal SSA value
				fmt.Fprintf(f, "\t\tnode%d [label=<%s <font point-size=\"6\">[%d]</font>>]\n", i, names[i], i)
			}
			chl, chr := po.children(i)
			for _, ch := range []posetEdge{chl, chr} {
				if ch != 0 {
					if ch.Strict() {
						fmt.Fprintf(f, "\t\tnode%d -> node%d [label=\" <\" color=\"red\"]\n", i, ch.Target())
					} else {

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