Can't use with package smartdiagram

[joaopbnogueira]

Can't simultaneously use with smartdiagram package.

had to modify the source code from:

(...) \pgfsetlayers{background,connectionlayers,main} (...)

to:

(...) \pgfsetlayers{background,connectionlayers,main,smart diagram arrow back} (...)

It is likely that other issues exist.

Keep up the good work.