HeaderValue parse(String value, { String parameterSeparator: ";", String valueSeparator: null, bool preserveBackslash: false })

Creates a new header value object from parsing a header value string with both value and optional parameters.

Source 

static HeaderValue parse(String value,
    {String parameterSeparator: ";",
    String valueSeparator: null,
    bool preserveBackslash: false}) {
  return _HeaderValue.parse(value,
      parameterSeparator: parameterSeparator,
      valueSeparator: valueSeparator,
      preserveBackslash: preserveBackslash);
}