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  # serialize XML structure given in field 'xml' 
  xml_write(xml)
  xml_write(xml, pretty: 1)

This Catmandu::Fix serializes XML documents (given in MicroXML form as used by XML::Struct or as instance of XML::LibXML::Document). In short, this is a wrapper around XML::Struct::Writer.

Set to false to not expect attribute hashes in the XML structure.
Pretty-print XML if set to 1.

Catmandu::Fix::xml_read