how establish category general type?

i'm formulating general category methods i need know category general form now use. reason method's i expects an argument.

example:

public category mygenericclass<t> {
  open vacant dosomething() {
    // snip...
    // 3rd jubilee lib
    t bean = (t)someobject.create(t.class);
    // snip...
  }
}

clearly instance above doesn't work law following error: illicit category verbatim form parameter t.

my doubt is: does someone know good choice workaround this?