src/vs/workbench/contrib/terminal/browser/terminalView.ts/TerminalThemeIconStyle/_registerListeners
class TerminalThemeIconStyle:	private _registerListeners(): void {
		this._register(this._terminalService.onInstanceIconChanged(() => this.updateStyles()));
		this._register(this._terminalService.onInstanceColorChanged(() => this.updateStyles()));
		this._register(this._terminalService.onDidChangeInstances(() => this.updateStyles()));
		this._register(this._terminalGroupService.onDidChangeGroups(() => this.updateStyles()));
	}