How to use the pastas.rfunc.RfuncBase.__init__ function in pastas

def __init__(self, up=False, meanstress=1, cutoff=0.99):
        RfuncBase.__init__(self, up, meanstress, cutoff)
        self.nparam = 3

def __init__(self, up=True, meanstress=1, cutoff=0.99):
        RfuncBase.__init__(self, up, meanstress, cutoff)
        self.nparam = 3

def __init__(self, up, meanstress, cutoff):
        RfuncBase.__init__(self, up, meanstress, cutoff)
        self.nparam = 1

def __init__(self, up=True, meanstress=1, cutoff=0.99):
        RfuncBase.__init__(self, up, meanstress, cutoff)
        self.nparam = 3

def __init__(self, up=False, meanstress=1, cutoff=0.999):
        RfuncBase.__init__(self, up, meanstress, cutoff)
        self.nparam = 3

def __init__(self, up=True, meanstress=1, cutoff=0.99):
        RfuncBase.__init__(self, up, meanstress, cutoff)
        self.nparam = 3

def __init__(self, up=True, meanstress=1, cutoff=0.999):
        RfuncBase.__init__(self, up, meanstress, cutoff)
        self.nparam = 4
        self.quad = False

def __init__(self, up=True, meanstress=1, cutoff=0.999):
        RfuncBase.__init__(self, up, meanstress, cutoff)
        self.nparam = 3

def __init__(self, up=None, meanstress=1, cutoff=0.999):
        RfuncBase.__init__(self, up, meanstress, cutoff)
        self.nparam = 1

def __init__(self, up=False, meanstress=1, cutoff=0.999):
        RfuncBase.__init__(self, up, meanstress, cutoff)
        self.nparam = 3