Warnings for deprecated usage of getter when using Calendar Pro

[ilieandriuta]

STEPS TO REPRODUCE

Tested on XWiki 11.10.4.

1. Create a new event in a Calendar
2. Set the Title, Start date, End date and Description

EXPECTED RESULTS

No warnings are displayed.

ACTUAL RESULTS

In console, there are many warnings displayed related to deprecated usage of getter, like:

2020-04-22 09:46:52,960 [http://localhost:1113/bin/edit/MoccaCalendar/Calendar1ad/randomPageUblADkoBC4?template=MoccaCalendar.MoccaCalendarEventTemplate&parentFROM=MoccaCalendar.Calendar1ad.WebHome&form_token=sp3MsvmwwansqEKxp1cscg&ocalcaction=create&MoccaCalendar.MoccaCalendarEventClass_0_startDate=22.04.2020%2000%3A00&MoccaCalendar.MoccaCalendarEventClass_0_endDate=&MoccaCalendar.MoccaCalendarEventClass_0_allDay=true&xpage=plain&xhidden=1] WARN o.x.v.i.DefaultVelocityEngine - Deprecated usage of getter [com.xpn.xwiki.api.Document.getRealLanguage] in 62:xwiki:MoccaCalendar.MoccaCalendarEventSheet@13,69 2020-04-22 09:46:59,025 [http://localhost:1113/bin/edit/MoccaCalendar/Calendar1ad/randomPageUblADkoBC4?template=MoccaCalendar.MoccaCalendarEventTemplate&parentFROM=MoccaCalendar.Calendar1ad.WebHome&form_token=sp3MsvmwwansqEKxp1cscg&ocalcaction=create&xpage=plain&xhidden=1] WARN o.x.v.i.DefaultVelocityEngine - Deprecated usage of getter [com.xpn.xwiki.api.Document.getRealLanguage] in 59:xwiki:MoccaCalendar.MoccaCalendarEventSheet@13,69 2020-04-22 09:49:39,305 [http://localhost:1113/bin/edit/MoccaCalendar/Calendar2%20us/randomPagenGt7MvPSd4?template=MoccaCalendar.MoccaCalendarEventTemplate&parentFROM=MoccaCalendar.Calendar2%20us.WebHome&form_token=0IsFVhU0LC5hrJz3iKYe4A&ocalcaction=create&xpage=plain&xhidden=1] WARN o.x.v.i.DefaultVelocityEngine - Deprecated usage of getter [com.xpn.xwiki.api.Document.getRealLanguage] in 60:xwiki:MoccaCalendar.MoccaCalendarEventSheet@13,69 2020-04-22 09:57:22,803 [http://localhost:1113/bin/edit/MoccaCalendar/randomPage4zAzxMcfkM?template=MoccaCalendar.MoccaCalendarEventTemplate&parentFROM=MoccaCalendar.Events&form_token=sp3MsvmwwansqEKxp1cscg&ocalcaction=create&MoccaCalendar.MoccaCalendarEventClass_0_startDate=21.04.2020%2010%3A00&MoccaCalendar.MoccaCalendarEventClass_0_endDate=21.04.2020%2010%3A30&MoccaCalendar.MoccaCalendarEventClass_0_allDay=false&xpage=plain&xhidden=1] WARN o.x.v.i.DefaultVelocityEngine - Deprecated usage of getter [com.xpn.xwiki.api.Document.getRealLanguage] in 64:xwiki:MoccaCalendar.MoccaCalendarEventSheet@13,69

Environment: Windows 10 Pro 64bit, Chrome 81, using an instance of XWiki 11.10.4 on PostgreSQL 12, Tomcat, Docker