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I am a beginner, in DRC deck, may I know how to check if a layer exist?
Because I find when I check the rules between two layers, for example spacing between layer1 and layer2. if layer1 exist and have lots of shapes, and if layer2 not exist, the deck still spend much time to check the rule. I want to check if both layer1 and layer2 exist, then check the rule, if any layer not exist, then skip the rule. This can same much time.