Bytes is a flag.Func parsing function that translates a string into a specific byte-width array.

Parse processes all flag data given the input format and the precondition that all input flags have been parsed.

ParseBytes returns the denoted bytes from the reader `in` or an error.

Filey indicates the input is coming from a file.

Stringy indicates the input is coming from an argument string.

InputType represents how data is coming in, either via file or string.