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  • I want to apply the 'DonutBuilder' transformer to several polygon layers, the output layers will be merged into one polygon layer containing the combined dropped 'holes'. How can i achieve this?

use a featurereader or advanced reader, aply

DonutBuilder grouped by feature type (if needed), keep holes.

Filter non-holes using a tester (DonutBuilder creates an attribute "_hole_flag" you can test on).

Use a dissolver.

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