Access to the differential equations of the system.

[HuynhTran0301]

Hello everyone,
I am curious about how could I access the differential equations inside the system after calling a function like Solver1D? and how could I know the total of equations that have been implemented in the system?

Because when I implement the total equations in def function more than the total of nets or conditions the system still works. So I am curious how the system reads the function that I have defined in the def function.