With Azure communication Calling library I tried to get network quality.

const { CallClient, VideoStreamRenderer, LocalVideoStream } = require('@azure/communication-calling');
const { AzureCommunicationTokenCredential } = require('@azure/communication-common');
const { AzureLogger, setLogLevel } = require("@azure/logger");

I tried this 2 codes but I have the same error “feature is not defined”.

call.feature(Features.UserFacingDiagnostics).network.on('diagnosticChanged', (diagnosticInfo) => {
    if (diagnosticInfo.diagnostic === 'networkReceiveQuality') {
        if (diagnosticInfo.value === DiagnosticQuality.Bad) {
            console.log("Network quality = BAD");
        } else if (diagnosticInfo.value === DiagnosticQuality.Poor) {
            console.log("Network quality = POOR");
        } else if (diagnosticInfo.value === DiagnosticQuality.Good) {
            console.log("Network quality = GOOD");
        }
    }
});

and

const userFacingDiagnostics = call.feature(Features.UserFacingDiagnostics);

userFacingDiagnostics.media.on("diagnosticChanged", (diagnosticInfo) => {
  console.log(diagnosticInfo);
});

userFacingDiagnostics.network.on("diagnosticChanged", (diagnosticInfo) => {
   console.log(diagnosticInfo);
});

Did I forget to import something?