Why does class constructor not have the same name as the class?

The delivered application package PT_IB_LOOKUPREST defines the class RestRequestHandler as follows

import PS_PT:Integration:IRequestHandler;

import PT_IB_LOOKUPREST:*;

/* .... */

class RequestHandlerRest implements PS_PT:Integration:IRequestHandler

   method RequestHandler();

/* .... */

end-class;

/* constructor */

method RequestHandler

end-method;

/* .... */

Why isn't the constructor for the class named RequestHandlerRest? Shouldn't it be the same as the class?