Emitted when the selection style changes, via [[Editor.setSelectionStyle]].
Contains one property, data, which indicates the new selection style
data
Emitted whenever the [[EditSession]] changes.
An object with two properties, oldSession and session, that represent the old and new [[EditSession]]s.
oldSession
session
Emitted when text is copied.
Emitted when text is pasted.
Emitted when the selection style changes, via [[Editor.setSelectionStyle]].