...
#macro (createDocumentDiffSummary $docDiff $return)
$services.logging.getLogger('org.xwiki').info('XXXX $docDiff = {}', $docDiff)
  #set ($entries = [])
...

2024-03-20 14:25:39,893 [Mail Prepare Thread] INFO  o.xwiki                        - XXXX $docDiff = {documentReference=xwiki:Main.WebHome, oldDoc=Main.WebHome, newDoc=Main.WebHome, metaData=[], tags=null, attachments=[], objects=[], classProperties=[]}