how can I extend an exsting type?

[lucamorelli]

I just opened this question in stackoverflow:
http://stackoverflow.com/questions/26327520/how-can-i-extend-an-existing-class-in-typescript/26329137#26329137

The point is that the code I'm adding to the project inject a few methods in the Pushpin class.
Is possible to do this in typescript? If not is planned?

thanks,
Luca

[danquirk]

Classes in TypeScript are not open ended (see #819 for this suggestion). You can do the usual inheritance techniques but you cannot jam new type information into an existing class. Interfaces and modules are open ended and additional declarations with the same name will merge together.