Consider starting at the default behavior with the documentation. For example, in the parse section, if no header option is provided, the first row will be returned as an array correct?

Start there: "The default behavior is to return each row of the CSV as an array." then "If the CSV file has a header, pass in {header: true} to get back an object using the header values as keys." then "If the file does not have a header, pass in ...".

Also, can a user override a header that is present in the data?