bug: gwf.modeltime.steady_state inconsistent with input/output about flopy

[aleaf]

A related issue with loading a model: If the STO package isn't included in the load, gwf.modeltime.steady_state returns all True for each stress period.

sim.write_simulation()
loaded_sim = fp.mf6.MFSimulation.load('testsim', sim_ws=out_dir, load_only=['dis'])
loaded_gwf = loaded_sim.get_model('testmodel')
loaded_gwf.modeltime.steady_state

array([ True, True, True, True])

Maybe loaded_gwf.modeltime.steady_state should be None at this point to make it clear that the model doesn't have this information?

[spaulins-usgs]

The first problem should now be fixed.

Regarding your second comment, the MF6 documentation states, "If the STO Package is not included for a model, then storage changes will not be calculated, and thus, the model will be steady state.". Given this, I think it is reasonable for flopy's modeltime.steady_state to be true when the STO package does not exist.