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Definition
/**
* Create a JSON serializer for OTLP.
*
* Returns a JsonSerializer that converts telemetry data to OTLP JSON wire format.
* Use this with HttpTransport for JSON over HTTP.
*
* Example usage:
* ```php
* $serializer = otlp_json_serializer();
* $transport = otlp_http_transport($client, $reqFactory, $streamFactory, $endpoint, $serializer);
* ```
*/
otlp_json_serializer() : JsonSerializer
