finesse.parameter.Parameter.set_external_setter
- Parameter.set_external_setter(self, element, symbol)
 Sets an element as an external controller of the value of this parameter. It is used in cases where an element is physically imposing its value onto this one, such as degrees of freedom.
- Parameters:
 - elementModelElement
 Element that will be controlling this parameter
- symbolsymbolic expression
 The expression that this element is imposing upon the parameter.