Print description in AbstractTrees.printnode()

Author: hersle

src/systems/abstractsystem.jl

@@ -2899,11 +2899,12 @@ function Base.showerror(io::IO, e::HybridSystemNotSupportedException)
     print(io, "HybridSystemNotSupportedException: ", e.msg)
 end
 
-function AbstractTrees.children(sys::ModelingToolkit.AbstractSystem)
+function AbstractTrees.children(sys::AbstractSystem)
     ModelingToolkit.get_systems(sys)
 end
-function AbstractTrees.printnode(io::IO, sys::ModelingToolkit.AbstractSystem)
+function AbstractTrees.printnode(io::IO, sys::AbstractSystem; describe = true)
     print(io, nameof(sys))
+    describe && !isempty(get_description(sys)) && print(io, ": ", get_description(sys))
 end
 function Base.IteratorEltype(::Type{<:TreeIterator{ModelingToolkit.AbstractSystem}})
     Base.HasEltype()