HL7.Header.new

You're seeing just the function new, go back to HL7.Header module for more information.
Link to this function

new(message_type, trigger_event, message_control_id, processing_id \\ "P", version \\ "2.1")

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Specs

new(String.t(), String.t(), String.t(), String.t() | list(), String.t()) :: t()