protected function propertyInUse(array $tokens, int $closeTagIndex, string $variable): bool {
		/** @var string $property */
		$property = substr($variable, 1);

		$i = $closeTagIndex + 1;
		while (isset($tokens[$i])) {
			if ($tokens[$i]['code'] !== T_VARIABLE || $tokens[$i]['content'] !== '$this') {
				$i++;
				continue;
			}
			$i++;
			if ($tokens[$i]['code'] !== T_OBJECT_OPERATOR) {
				$i++;
				continue;
			}
			$i++;
			$token = $tokens[$i];
			if ($token['code'] !== T_STRING || $token['content'] !== $property) {
				$i++;
				continue;
			}
			$i++; // 520
			if ($tokens[$i]['code'] !== T_OBJECT_OPERATOR) {
				$i++;
				continue;
			}

			return true;
		}

		return false;
	}