DocumentModelMapper: Extracted handling of references/embeds
DocumentModelMapper: Extracted handling of references/embeds

jabbrwcky/guacamole,jabbrwcky/guacamole,jabbrwcky/guacamole,triAGENS/guacamole,jabbrwcky/guacamole,triAGENS/guacamole,triAGENS/guacamole,triAGENS/guacamole