constructor(
defaultKeybindings: ResolvedKeybindingItem[],
/** user's keybindings */
overrides: ResolvedKeybindingItem[],
log: (str: string) => void
) {
this._log = log;
this._defaultKeybindings = defaultKeybindings;
this._defaultBoundCommands = new Map<string, boolean>();
for (const defaultKeybinding of defaultKeybindings) {
const command = defaultKeybinding.command;
if (command && command.charAt(0) !== '-') {