Tai.VenueAdapters.Bitmex.AmendBulkOrders.send_to_venue

You're seeing just the function send_to_venue, go back to Tai.VenueAdapters.Bitmex.AmendBulkOrders module for more information.
Link to this function

send_to_venue(credentials, params)

See ExBitmex.Rest.Orders.amend_bulk/2.