Public Sub InsertAt( _
    ByVal index As Integer, _
    ByVal coefficient As Double _
)

public void InsertAt(
    int index,
    double coefficient
);

public: void InsertAt(
    int index,
    double coefficient
);

public: HRESULT InsertAt(
    int index,
    double coefficient
);

public void insertAt(
    Integer index,
    double coefficient
);

def InsertAt(self, index:int, coefficient:float) -> None: