release-1.x examples line `kc.getCluster(currentContext) returns null

[pauliusg]

With 1.0.0-rc4 I am running code similar to one in https://github.com/kubernetes-client/javascript/blob/release-1.x/examples/patch-example.js

And when running:

    let currentContext = kc.getCurrentContext();
    let currentCluster = kc.getCluster(currentContext);

currentCluster is null.

I guess that example code part is not right. For me working code is:

 const currentCluster = kc.getCurrentCluster();

I wrote examples in the title because similar code is in several examples.

[brendandburns]

Thanks for the issue report, I will investigate.

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