I would like to have:

const COMMANDS_XML: &str = include_str!("../../doc/commands.xml");
const commands_xml: CommandsXml = quick_xml::de::from_str(COMMANDS_XML).unwrap();

As written this does not compile because quick_xml::de::from_str is not a constant function.
I don't particuarly care about the performance difference between building the commands_xml structure at compile time or program startup.
My concern is that this structure is only used in the one file, so I would like to avoid needing to update main() to call an initialize function; as well as needing to pass this structure explicitly to all call points that might call into this module.

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