http://lucene.apache.org/lucene-parent/lucene-expressions: Dynamically computed values to sort/facet/search on based on a pluggable grammar. (The Apache Software Foundation) 
public abstract class org.apache.lucene.expressions.Bindings
  minor version: 0
  major version: 59
  flags: flags: (0x0421) ACC_PUBLIC, ACC_SUPER, ACC_ABSTRACT
  this_class: org.apache.lucene.expressions.Bindings
  super_class: java.lang.Object
{
  protected void <init>();
    descriptor: ()V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.lucene.expressions.Bindings this
         0: .line 33
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // org.apache.lucene.expressions.Bindings this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/apache/lucene/expressions/Bindings;

  public abstract org.apache.lucene.search.DoubleValuesSource getDoubleValuesSource(java.lang.String);
    descriptor: (Ljava/lang/String;)Lorg/apache/lucene/search/DoubleValuesSource;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      name  
}
SourceFile: "Bindings.java"