extensions/npm/src/features/jsonContributions.ts/JSONCompletionItemProvider/isLast
class JSONCompletionItemProvider:	private isLast(scanner: JSONScanner, offset: number): boolean {
		scanner.setPosition(offset);
		let nextToken = scanner.scan();
		if (nextToken === SyntaxKind.StringLiteral && scanner.getTokenError() === ScanError.UnexpectedEndOfString) {
			nextToken = scanner.scan();
		}
		return nextToken === SyntaxKind.CloseBraceToken || nextToken === SyntaxKind.EOF;
	}