https://lucene.apache.org/lucene-parent/lucene-spatial-extras: Advanced Spatial Shape Strategies for Apache Lucene (The Apache Software Foundation) 
public interface org.apache.lucene.spatial.prefix.tree.NumberRangePrefixTree$NRShape extends org.locationtech.spatial4j.shape.Shape, java.lang.Cloneable
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: org.apache.lucene.spatial.prefix.tree.NumberRangePrefixTree$NRShape
  super_class: java.lang.Object
{
  public abstract java.lang.String toString();
    descriptor: ()Ljava/lang/String;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract org.apache.lucene.spatial.prefix.tree.NumberRangePrefixTree$NRShape roundToLevel(int);
    descriptor: (I)Lorg/apache/lucene/spatial/prefix/tree/NumberRangePrefixTree$NRShape;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
             Name  Flags
      targetLevel  
}
SourceFile: "NumberRangePrefixTree.java"
NestHost: org.apache.lucene.spatial.prefix.tree.NumberRangePrefixTree
InnerClasses:
  public abstract NRShape = org.apache.lucene.spatial.prefix.tree.NumberRangePrefixTree$NRShape of org.apache.lucene.spatial.prefix.tree.NumberRangePrefixTree