DoInstall
err = item->DoInstall(installPath, &state);
err = item->DoInstall(installPath, &state);
status_t status = script->DoInstall(installPath);
virtual status_t DoInstall(const char* path = NULL,
virtual status_t DoInstall(const char* path = NULL,
virtual status_t DoInstall(const char* path = NULL,
virtual status_t DoInstall(const char* path = NULL,
virtual status_t DoInstall(const char* path = NULL,