How to use worker rest api effective-of

Summary:

Use of Worker Rest api to fetch workrelationship and assignment information for a particular effective date

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We are using Worker Rest api and using effectiveDate query parameter to get data for a particular date but that effective date is not working for workrelationships or for assignments. How can we get particular workrelationship and assignment for a particular effective date because we have multiple workrelationship and also multiple assignments .

I tried using "effective-of" header parameter and providing RangeStartDate and RangeEndDate.But its not working.

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