These docs are for an old release.
Info on upgrading to v4
groupByResource scheduler 1.1
Determines if multi-day agenda or basic views should display resource columns. If so, renders resource headings above date headings.
Boolean, default: false
Beware this will affect all multi-day basic/agenda views, which might look bad for views that have many days. If you’d like to target a specific view, use View-Specific Options.