fixed missing var
fixed missing var

dhalperi/google-cloud-datastore,pcostell/google-cloud-datastore,eddavisson/google-cloud-datastore,dhalperi/google-cloud-datastore,t9nf/google-cloud-datastore,andreaegan-wf/google-cloud-datastore,eddavisson/google-cloud-datastore,pakkig/devwork,eddavisson/google-cloud-datastore,andreaegan-wf/google-cloud-datastore,dhalperi/google-cloud-datastore,googleapis/google-cloud-datastore,t9nf/google-cloud-datastore,t9nf/google-cloud-datastore,dhalperi/google-cloud-datastore,andreaegan-wf/google-cloud-datastore,andreaegan-wf/google-cloud-datastore,googleapis/google-cloud-datastore,pcostell/google-cloud-datastore,pakkig/devwork,pakkig/devwork,dhalperi/google-cloud-datastore,pakkig/devwork,t9nf/google-cloud-datastore,andreaegan-wf/google-cloud-datastore,pcostell/google-cloud-datastore,pcostell/google-cloud-datastore,googleapis/google-cloud-datastore,eddavisson/google-cloud-datastore,pakkig/devwork,t9nf/google-cloud-datastore