Some comments

Just some comments on how I am going to make the desired changes (have a
Dirichlet boundary condition for the electric potential that changes
with time). This might be a good opportunity to rework the boundary
conditions in the electrostatic field and include other things like a
Newmann boundary condition. We will see.

src/modules/solver/electromagnetic/moduleEM.f90

@@ -2,6 +2,7 @@
 MODULE moduleEM
   IMPLICIT NONE
 
+  ! TODO: Make this a derived type.
   TYPE:: boundaryEM
     CHARACTER(:), ALLOCATABLE:: typeEM
     INTEGER:: physicalSurface
@@ -9,6 +10,7 @@ MODULE moduleEM
 
     CONTAINS
       PROCEDURE, PASS:: apply
+      !PROCEDURE, PASS:: update !only for time dependent boundary conditions or maybe change apply????? That might be better.
 
   END TYPE boundaryEM