How-to-use-common-variable-for-muti-datasources-in-a-single-dashboard

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I am having a existing grafana dashboard working on Thanos datasource and I have also included a elastic search(datasource) panel in the same dashboard by elasticsearch environment variable. Is there any posible way, having common variables (env,lz) for the datasource panels in the dashboard ? I have checked for a grafana plugin but there is no plugin which is useful. Please share your valuable thoughts.

THANK YOU!!

~ the grafana team