STYLE: Duplicate information in SHM reference dict
// Optional: keep zero-sized patches. By default snappyHexMesh filters
// these out.
//keepPatches true; // default false
//Optional: preserve all generated patches. Default is to remove
// zero-sized patches.
//keepPatches true;
in applications/utilities/mesh/generation/snappyHexMesh/snappyHexMeshDict