src/vs/workbench/api/browser/mainThreadDocumentsAndEditors.ts/DocumentAndEditorStateDelta/toString
class DocumentAndEditorStateDelta:	toString(): string {
		let ret = 'DocumentAndEditorStateDelta\n';
		ret += `\tRemoved Documents: [${this.removedDocuments.map(d => d.uri.toString(true)).join(', ')}]\n`;
		ret += `\tAdded Documents: [${this.addedDocuments.map(d => d.uri.toString(true)).join(', ')}]\n`;
		ret += `\tRemoved Editors: [${this.removedEditors.map(e => e.id).join(', ')}]\n`;
		ret += `\tAdded Editors: [${this.addedEditors.map(e => e.id).join(', ')}]\n`;
		ret += `\tNew Active Editor: ${this.newActiveEditor}\n`;
		return ret;
	}