open firstline 1 linenumbers true declares what part everything select the parts you want to use by declaring the import as follows In the we create a variable named "fmModel" and assign a new "WaterFlowFMModel" instance to it. This is possible because the "FlowFlexibleMeshFunctions" library defined WaterFlowFMModel Ctrl Enter variable now firstline 1 linenumbers true
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you able to see the model (just like the image below)