Nodes of different colours represent the following:
Solid arrows point from a parent (sub)module to the submodule which is
descended from it. Dashed arrows point from a module being used to the
module or program unit using it.
program test_tester_4use testerimplicit none type(tester_t)::testcall test%init()call test%assert_equal(.true.,1>2)call test%print()end program test_tester_4