@property<EOL><INDENT>def field_ref(self):<DEDENT>
return self._field_ref<EOL>
Gets the field_ref of this V1EnvVarSource.
Selects a field of the pod: supports metadata.name, metadata.namespace, metadata.labels, metadata.annotations, spec.nodeName, spec.serviceAccountName, status.hostIP, status.podIP.

:return: The field_ref of this V1EnvVarSource.
:rtype: V1ObjectFieldSelector