With this test model the following properties are tested:
Defining an FMU with incomplete initialization (so this FMU can only be simulated
if additional initialization conditions are defined in the environment where the FMU
is imported).
In the environment one instance is defined with steady-state and state initialization.
The value of parameter gain shall be determined so that the initialization conditions
are fulfilled.
This FMU leads to a linear algebraic equation over the FMU during initialization.