Getting Error when returning a list which holds objescts of same class !!

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C++

Hi,
I have a function if is defined line its working fine, but when I define outside the class I am getting compilation error.
Can anyone help me on this??
Here is my code sinppet....

#include<iostream>
#include<map>
#include<string>
#include<conio.h>
#include<list>
using namespace std;
template<class T>
class Test
{
    map<string,T> mobj;
    public:
           void getData();
           map<string,T> show();
           list<Test> Myshow();

};
template<class T>
Test<T>::Myshow()  //This is giving error
 {
           return 0;
}
template<class T>
void Test<T>::getData()
{
     this->mobj.insert(pair<string,T>("",""));
}

int main()
{
    getch();
    return 0;
}

Regards,
Mahesh