val commands: List<String>?
Editing commands to send with the key event (e.g., 'selectAll') (default: []).
These are related to but not equal the command names used in document.execCommand and
NSStandardKeyBindingResponding.
See
https://source.chromium.org/chromium/chromium/src/+/master:third_party/blink/renderer/core/editing/commands/editor_command_names.h
for valid command names.