Using traits how do i get a function's parameters as a string?

[Gary Willoughby]

Using traits how do i get a methods's parameters as a string? Say 
i have the following method:

...
public void setAge(int age)
{
    this._age = age;
}
...
I want a string that is: "(int age)" or how ever many params 
there are. The nearest i got was using this code:

ParameterTypeTuple!(__traits(getMember, T, "setAge")).stringof

Which yieds: "(int)"

Any ideas?