docs: def _get_tpm_capability(self):
          """Retrieves if server is TPM capable or not.
  
          :returns True if TPM is Present else False
          """
          tpm_values = {"NotPresent": False,
                        "PresentDisabled": True,
                        "PresentEnabled": True}
          try:
              tpm_state = self._get_bios_setting('TpmState')
          except exception.IloCommandNotSupportedError:
              tpm_state = "NotPresent"
          tpm_result = tpm_values[tpm_state]
          return tpm_result