Need help with yogiben Prettyemail

Im trying to use pretty email but the documentation is not really clear how to call it.

here is how I’m calling it but in the doc its another way both not working for me.

    PrettyEmail.send({ 'call-to-action'
      to: emailData.email
      subject: 'You got new message'
      heading: 'Your friend sent you a message'
      message: 'Click the button below to read the message'
      buttonText: 'Read message'
      buttonUrl: 'http://mycompany.com/messages/2314'
    });

Does anyone have a generic example of how to call this.

its like this in the doc

PrettyEmail.send ‘call-to-action’,
to: 'myuser@myuser.com’
subject: 'You got new message’
heading: 'Your friend sent you a message’
message: 'Click the button below to read the message’
buttonText: 'Read message’
buttonUrl: 'http://mycompany.com/messages/2314
messageAfterButton: “I come after the button!”