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 acc_r(omega,mass,r)real(wp),intent(in)::omega,mass,rreal(wp)::acc_racc_r=(r-2.0_wp*mass)*(mass-r**3*omega**2)&/(r**2*(r-2.0_wp*mass-r**3*omega**2))end function acc_r