@startuml skinparam backgroundColor transparent skinparam shadowing false skinparam DefaultFontName "Inter", "system-ui", sans-serif skinparam DefaultFontSize 12 skinparam Padding 8 skinparam RoundCorner 12 skinparam MaxMessageSize 150 skinparam wrapWidth 200 skinparam nodesep 50 skinparam ranksep 50 rectangle "User Application" as app rectangle "Object Manager" as om rectangle "Specific Object (e.g. File)" as obj app -> om : "Open File 'data.txt'" om -> om : "Check Permissions" om -> obj : "Create Reference" om --> app : "Return Handle (e.g. 0x4A2)" @enduml Submit amiga aws-orange black-knight bluegray blueprint cerulean-outline cerulean crt-amber crt-green cyborg-outline cyborg hacker lightgray mars materia-outline materia metal mimeograph minty plain reddress-darkblue reddress-darkgreen reddress-darkorange reddress-darkred reddress-lightblue reddress-lightgreen reddress-lightorange reddress-lightred sandstone silver sketchy-outline sketchy spacelab spacelab-white superhero-outline superhero toy united vibrant       🎉 Discover the future PlantUML Web Editor! 🚀  PNG  SVG  ASCII Art