is_valid#
- LayerCollection.is_valid()#
 Determine if the layer collection is in a valid state.
For a laminate stackup, this method checks whether there is layer overlapping or a gap. For an overlapping stackup, this method checks whether there is a dielectric layer overlapping or a gap.
- Returns:
 - bool
 Trueif the layer collection is in a valid state,Falseotherwise.