C++. I am given a method in a class and I am not sure how to declare it. What would be the correct way?

class myClass {

public:

//code

private:

//code

//class Data code

Node* bst_construct(vector &D, int left, int right);

};

in my main.cpp file I tried to declare it like so, but I get an error of "unknown type name node":

Node* myClass::bst_construct(vector &D, int left, int right){

//code

};