In the current online version (v1.2024.0beta3) the `!include_once` command includes the same file a second time.
Eg. in following sample the ".../C4_Container.puml" file defines a `C4Version()` procedure.
And if the file would be loaded only once, then the second `!include_once` should not reset the procedure like below
@startuml
!include_once https://raw.githubusercontent.com/plantuml-stdlib/C4-PlantUML/master/C4_Container.puml
[C4Version()-UNCHANGED ORIGINAL]
!function C4Version()
!$c4Version = "MyC4DiagramVersion"
!return $c4Version
!end function
[C4Version()-CHANGED]
' if this is commented out (=simulates the working !include_once) then it remain changed
!include_once https://raw.githubusercontent.com/plantuml-stdlib/C4-PlantUML/master/C4_Container.puml
[C4Version()-REMAINCHANGEDAFTERINCLUDEONCE]
@enduml
but if !include_once would work (like in the simulation below, with commented !include_once line) then there should be 2 components "MyC4DiagramVersion-...." and not only one.
BR
Helmut
PS.: orig found in C4-PlantUML issue #368 comment - Solution2 !include_once not working
