How send email with file

[aas]

I have xls report file on the server and need to send this file in email in scriptrunner but don't understand how to add file in email 

def mailServer = ComponentAccessor.getMailServerManager().getDefaultSMTPMailServer()
if (mailServer) {
Email email = new Email(to)
email.setCc(cc)
email.setSubject(subject)
email.setBody(body)
email.setMimeType("text/html")
mailServer.send(email)
log.debug("Mail sent to (${to}) and cc'd (${cc})")
} 

I can add only String body. 

[Aron Gombas _Midori_ · Accepted solution]

I think the attachment goes to its separate "part". So check out the Email class' methods for how to work with "email parts".

[aas]

I've checked out com.atlassian.email and haven't found anything about attachments

i searched here https://docs.atlassian.com/software/jira/docs/api/7.13.8/com/atlassian/jira/mail/Email.html