extensions/typescript-language-features/src/tsServer/bufferSyncSupport.ts/SyncedBuffer/onContentChanged
class SyncedBuffer:	public onContentChanged(events: readonly vscode.TextDocumentContentChangeEvent[]): void {
		if (this.state !== BufferState.Open) {
			console.error(`Unexpected buffer state: ${this.state}`);
		}

		this.synchronizer.change(this.resource, this.filepath, events);
	}