We would like to hide a tab not the content of the tab.
Indeed, we know how to dynamically hide element in an editEvent Panel
{
type : 'tabpanel',
ref : 'myEventEditTabs',
items: [
{
title : 'General',
dataset : {eventType: 'Meeting'}, // Why this makes the content (items) hidden not the tab
items : [
............
]
}