Nodes of different colours represent the following:
Solid arrows point from a procedure to one which it calls. Dashed
arrows point from an interface to procedures which implement that interface.
This could include the module procedures in a generic interface or the
implementation in a submodule of an interface in a parent module.
function utility_zdotu(a,b)complex(kind=dp),intent(in),dimension(:)::a,bcomplex(kind=dp)::utility_zdotuutility_zdotu=sum(a*b)return end function utility_zdotu