def from_dynacRepr(cls, pynacRepr):
        """
        Construct a ``Set4DAperture`` instance from the Pynac lattice element
        """
        energyDefnFlag = int(pynacRepr[1][0][0])
        energy = float(pynacRepr[1][0][1])
        phase = float(pynacRepr[1][0][2])
        x = float(pynacRepr[1][0][3])
        y = float(pynacRepr[1][0][4])
        radius = float(pynacRepr[1][0][5])

        return cls(energy, phase, x, y, radius, energyDefnFlag)
Construct a ``Set4DAperture`` instance from the Pynac lattice element