import the modules specified in init

def resolve_node_modules(self):
        'import the modules specified in init'
        if not self.resolved_node_modules:
            try:
                self.resolved_node_modules = [
                    importlib.import_module(mod, self.node_package)
                    for mod in self.node_modules
                ]
            except ImportError:
                self.resolved_node_modules = []
                raise

        return self.resolved_node_modules