@startuml 
sprite $envelope_o [48x48/16] {
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}


!define FA_ENVELOPE_O(_alias) ENTITY(rectangle,black,envelope_o,_alias,FA ENVELOPE_O)
!define FA_ENVELOPE_O(_alias,_label) ENTITY(rectangle,black,envelope_o,_label,_alias,FA ENVELOPE_O)
!define FA_ENVELOPE_O(_alias,_label,_shape) ENTITY(_shape,black,envelope_o,_label,_alias,FA ENVELOPE_O)
!define FA_ENVELOPE_O(_alias,_label,_shape,_color) ENTITY(_shape,_color,envelope_o,_label,_alias,FA ENVELOPE_O)
skinparam folderBackgroundColor<<FA ENVELOPE_O>> White
@enduml