Creates a static parameter.

        Parameters
        ----------
        label : str
            A human-readable label for the parameter.
        val_mean : float
            The mean value of the parameter.
        val_range : float
            The minimum and maximum variance from the mean allowed for
            parameter.

def dynamic(cls, label, val_mean, val_range):
        """Creates a static parameter.

        Parameters
        ----------
        label : str
            A human-readable label for the parameter.
        val_mean : float
            The mean value of the parameter.
        val_range : float
            The minimum and maximum variance from the mean allowed for
            parameter.
        """
        return cls(label, ParameterType.DYNAMIC, (val_mean, val_range))