src/vs/workbench/contrib/scm/browser/dirtydiffDecorator.ts/DirtyDiffWorkbenchController/onDidChangeConfiguration
class DirtyDiffWorkbenchController:	private onDidChangeConfiguration(): void {
		const enabled = this.configurationService.getValue<string>('scm.diffDecorations') !== 'none';

		if (enabled) {
			this.enable();
		} else {
			this.disable();
		}
	}