Dataweave 2: remove all variables from event before caching

remove all variables from event

<sub-flow name="remove-all-variables-from-the-event" >
		<foreach doc:name="For Each" doc:id="f436329a-f0b8-406a-9dce-496a7313772e" collection='vars pluck ((val, key, index ) -> "varName": (key))'>
			<choice doc:name="Choice" doc:id="3d469c1d-673e-465b-9b36-06dd07d034ac" >
				<when expression="#[payload.varName in ['foo', 'bar']]">
					<remove-variable doc:name="Remove Variable" doc:id="f38857a7-acca-4678-9b82-bb407a3528e8" variableName="#[payload.varName]" />
				</when>
				<otherwise >
					<logger level="INFO" doc:name="Logger" doc:id="ff8a4fcc-52fc-452d-9f0f-bf893cb5b3e0" message="variable not in the remove list"/>
				</otherwise>
			</choice>
		</foreach>
	</sub-flow>