Sanity.query

You're seeing just the function query, go back to Sanity module for more information.
Link to this function

query(query, variables \\ %{}, query_params \\ [])

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Specs

query(String.t(), keyword() | map(), keyword() | map()) :: Sanity.Request.t()

Generates a request to the Query endpoint. Requests to this endpoint may be authenticated or unauthenticated. Unauthenticated requests to a dataset with private visibility will succeed but will not return any documents.