Absinthe.Phoenix.SubscriptionTest.push_doc

You're seeing just the function push_doc, go back to Absinthe.Phoenix.SubscriptionTest module for more information.
Link to this function

push_doc(socket, query, opts \\ [])

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Specs

push_doc(Phoenix.Socket.t(), String.t(), opts()) :: reference()

A small wrapper around Phoenix.ChannelTest.push/3.

The only option that is used is opts[:variables] - all other options are ignored.