val equals = header.delimiterOffset('=', pos, parameterEnd)
                val name = header.trimSubstring(pos, equals)
                val value =
                  if (equals < parameterEnd) {
                    header.trimSubstring(equals + 1, parameterEnd).removeSurrounding("\"")
                  } else {
                    null
                  }

      val equalsSign = header.delimiterOffset('=', pos, pairEnd)
      val name = header.trimSubstring(pos, equalsSign)
      if (name.startsWith("$")) {
        pos = pairEnd + 1
        continue
      }

      // We have either name=value or just a name.
      var value =
        if (equalsSign < pairEnd) {
          header.trimSubstring(equalsSign + 1, pairEnd)
        } else {
          ""
        }