public Map<String, String> parameters(final String headerName) {
    return getParams(header(headerName));
  }
Get all parameters from header value in response
<p>
This will be all key=value pairs after the first ';' that are separated by
a ';'

@param headerName
@return non-null but possibly empty map of parameter headers
lib/src/main/java/com/github/kevinsawicki/http/HttpRequest.java