Diagnostic plot in module `tm_a_mmrm` does not changes

[kartikeyakirar]

In the following scenarios, the diagnostic plot remains unchanged:

• When changing the adjustment method to Kenward-Roger.
• When altering the weights for LS means to equal.
• When modifying the correlation structure.
• When adjusting the confidence level.
• When changing Treatment Variable
• When changing subject identifier

Is this behavior can be expected?