API calls - Basic questions

Hello folks,
I am kind of new to kubernetes / also recently started doing some java programming, so please forgive me if my questions are basic…

  • What is the difference between these classes/methods:
    readPersistenVolumeStatus , readPersistenVolumeStatusCall or readPersistentVolumeStatusWithHttpInfo?
  • Also, my PV shows status as Terminating when I do “kubectl get pv” but when I do API call for mypv.getPhase it returns it as “Released”. which API can I call to get status back as “Terminating” instead of the phase value?
    Thanks alot