MuonTrap.Options.validate

You're seeing just the function validate, go back to MuonTrap.Options module for more information.
Link to this function

validate(context, cmd, args, opts)

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Specs

validate(:cmd | :daemon, binary(), [binary()], keyword()) :: t()

Validate options and normalize them for invoking commands

Pass in :cmd or :daemon for the first parameter to allow function-specific options.