code: def set_fixed_capabils(self, capabils):
          
          self.ess = capabils['ess']
          self.ibss = capabils['ibss']
          self.priv = capabils['priv']
          self.short_preamble = capabils['short_preamble']
          self.pbcc = capabils['pbcc']
          self.chan_agility = capabils['chan_agility']
          self.spec_man = capabils['spec_man']
          self.short_slot = capabils['short_slot']
          self.apsd = capabils['apsd']
          self.radio_meas = capabils['radio_meas']
          self.dss_ofdm = capabils['dss_ofdm']
          self.del_back = capabils['del_back']
          self.imm_back = capabils['imm_back']
docs: set keys of capabils into fields of object
          :capabils: dict