Call to undefined function GuzzleHttp\\Psr7\\build_query() - laravel

Question

I have searched online but could not get a solution. I know I have done some small mistakes. I generated my code with openapi-generator. I had a directory at nova-components root named as RegistroImprese I made another directory SevenData and moved all RegistroImprese into this new directory. I have gone through quite a lot of problems but fixed them. Until then my code was working fine. But now it's throwing an exception that query_build is undefined but this same function was working fine earlier. Nothing has helped me. Any help would be appreciated.
public function apiRegistroImpresePostRequest($request = null)
{
$resourcePath = '/api/RegistroImprese';
$formParams = [];
$queryParams = [];
$headerParams = [];
$httpBody = '';
$multipart = false;
if ($multipart) {
$headers = $this->headerSelector->selectHeadersForMultipart(
['application/json']
);
} else {
$headers = $this->headerSelector->selectHeaders(
['application/json'],
['application/json-patch+json', 'application/json', 'text/json', 'application/_*+json']
);
}
// for model (json/xml)
if (isset($request)) {
if ($headers['Content-Type'] === 'application/json') {
$httpBody = \GuzzleHttp\json_encode(ObjectSerializer::sanitizeForSerialization($request));
} else {
$httpBody = $request;
}
} elseif (count($formParams) > 0) {
if ($multipart) {
$multipartContents = [];
foreach ($formParams as $formParamName => $formParamValue) {
$formParamValueItems = is_array($formParamValue) ? $formParamValue : [$formParamValue];
foreach ($formParamValueItems as $formParamValueItem) {
$multipartContents[] = [
'name' => $formParamName,
'contents' => $formParamValueItem
];
}
}
// for HTTP post (form)
$httpBody = new MultipartStream($multipartContents);
} elseif ($headers['Content-Type'] === 'application/json') {
$httpBody = \GuzzleHttp\json_encode($formParams);
} else {
// for HTTP post (form)
$httpBody = \GuzzleHttp\Psr7\build_query($formParams);
}
}
$defaultHeaders = [];
if ($this->config->getUserAgent()) {
$defaultHeaders['User-Agent'] = $this->config->getUserAgent();
}
$headers = array_merge(
$defaultHeaders,
$headerParams,
$headers
);
$query = \GuzzleHttp\Psr7\build_query($queryParams);
return new Request(
'POST',
$this->config->getHost() . $resourcePath . ($query ? "?{$query}" : ''),
$headers,
$httpBody
);
}

Answer 1

This problem was solved by using Query::build. After Guzzle 7.2 build_query()was deprecated.