VariableRefresh🔗Options to config when to refresh a variable0: Never refresh the variable1: Queries the data source every time the dashboard loads.2: Queries the data source when the dashboard time range changes.Definition🔗type VariableRefresh int64 const ( VariableRefreshNever VariableRefresh = 0 VariableRefreshOnDashboardLoad VariableRefresh = 1 VariableRefreshOnTimeRangeChanged VariableRefresh = 2 )