React Native - Send Cookies to WebView

So there's a very simple example in the documentation that shows how you can pass cookies to a Webview:

const App = () => {
  return (
    <WebView
      source={{
        uri: 'http://example.com',
        headers: {
          Cookie: 'cookie1=asdf; cookie2=fdsa; cookie3=aaaa',
        },
      }}
    />
  );
};

How can I pass some attributes to each cookie?

If I open the Console in Google Chrome I can paste the following:

document.cookie ='cookie1=asdf;domain=.mydomain.com;path=/;'
document.cookie ='cookie2=fdsa;domain=.mydomain.com;path=/;'
document.cookie ='cookie3=aaaa;domain=.mydomain.com;path=/;'

This sets 3 cookies in the browser. Which is cool. If I try in React Native

const App = () => {
      return (
        <WebView
          source={{
            uri: 'http://example.com',
            headers: {
              Cookie: 'cookie1=asdf;domain=.mydomain.com;path=/;cookie2=fdsa;domain=.mydomain.com;path=/;cookie3=aaaa;domain=.mydomain.com;path=/;',
            },
          }}
        />
      );
    };

this will probably set 5 different cookies in the WebView: cookie1, cookie2, cookie3, domain, path