Allow sending mail to a list of groups + list of users + list of emails

{{velocity}}
## Parameters for the 'template' MimeMessageFactory
#set ($templateParameters = {'language' : $xcontext.language, 'velocityVariables' : { 'var1' : 'value1' }})

#set ($templateReference = $services.model.createDocumentReference('', 'Space', 'MailTemplatePage'))
#set ($parameters = {'hint' : 'template', 'parameters' : $templateParameters, 'source' : $templateReference})

#set ($groupReference = $services.model.createDocumentReference('', 'XWiki', 'MyGroup'))
#set ($user1Reference = $services.model.createDocumentReference('', 'XWiki', 'User1'))
#set ($user2Reference = $services.model.createDocumentReference('', 'XWiki', 'User2'))

#set ($source = {'groups' : [$groupReference], 'users' : [$user1Reference, $user2Reference], 'emails' : ['john@doe.com'], 'excludedUsers' : [], 'excludedEmails' : [], 'excludedGroups' : []})

#set ($messages = $services.mailsender.createMessages('usersandgroups', $source, $parameters))
#set ($mailResult = $services.mailsender.send($messages, 'database'))
{{/velocity}}