def init(self):
        self.label = InfoLabel(self.template)
read/write of 4D NMRPipe freq domain (two index) first slice.
dataset/ETHPy150Open los-cocos/cocos/cocos/fps.py/FpsDisplaySimple.init--crossover with--dataset/ETHPy150Open jjhelmus/nmrglue/nmrglue/fileio/tests/test_pipe.py/test_4d_freq_double_index_slice