What is the recommended way to modify list of templates in AmazonEC2Cloud instance?

Because the `templates` field is private, there is no easy way to load and modify the could configuration using Jenkins Groovy scripts.

One way is to use reflection to access the field and modify the list (from https://stackoverflow.com/a/49042851/1538920):

import hudson.model.*
import hudson.plugins.ec2.EC2Cloud
import hudson.plugins.ec2.SlaveTemplate
import jenkins.model.Jenkins
import java.lang.reflect.Field

def jenkins = Jenkins.get()
def newTemplate = new SlaveTemplate(...)
def cloud = jenkins.clouds.getByName('ec2-cloud')
Field field = EC2Cloud.class.getDeclaredField('templates')
field.setAccessible(true)
def templates = (List) field.get(cloud)
templates.add(newTemplate)
jenkins.save() 

The other would be to create a full copy of the AmazonEC2Cloud and remove the old one.

Is there a better way to do that and if not, could it be implemented in the plugin?