http://lucene.apache.org/lucene-parent/lucene-spatial3d: Lucene Spatial shapes implemented using 3D planar geometry (The Apache Software Foundation) 
public interface org.apache.lucene.spatial3d.geom.GeoMembershipShape extends org.apache.lucene.spatial3d.geom.GeoShape, org.apache.lucene.spatial3d.geom.GeoOutsideDistance, org.apache.lucene.spatial3d.geom.Membership
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: org.apache.lucene.spatial3d.geom.GeoMembershipShape
  super_class: java.lang.Object
{
}
SourceFile: "GeoMembershipShape.java"