https://github.com/google/guava/guava: Guava is a suite of core and expanded libraries that include utility classes, google's collections, io classes, and much much more. 
final class com.google.common.collect.SortedIterables
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: com.google.common.collect.SortedIterables
  super_class: java.lang.Object
{
  private void <init>();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.common.collect.SortedIterables this
         0: .line 30
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.google.common.collect.SortedIterables this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/collect/SortedIterables;

  public static boolean hasSameComparator(java.util.Comparator<?>, java.lang.Iterable<?>);
    descriptor: (Ljava/util/Comparator;Ljava/lang/Iterable;)Z
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=3, args_size=2
        start local 0 // java.util.Comparator comparator
        start local 1 // java.lang.Iterable elements
         0: .line 37
            aload 0 /* comparator */
            invokestatic com.google.common.base.Preconditions.checkNotNull:(Ljava/lang/Object;)Ljava/lang/Object;
            pop
         1: .line 38
            aload 1 /* elements */
            invokestatic com.google.common.base.Preconditions.checkNotNull:(Ljava/lang/Object;)Ljava/lang/Object;
            pop
         2: .line 40
            aload 1 /* elements */
            instanceof java.util.SortedSet
            ifeq 5
         3: .line 41
            aload 1 /* elements */
            checkcast java.util.SortedSet
            invokestatic com.google.common.collect.SortedIterables.comparator:(Ljava/util/SortedSet;)Ljava/util/Comparator;
            astore 2 /* comparator2 */
        start local 2 // java.util.Comparator comparator2
         4: .line 42
            goto 9
        end local 2 // java.util.Comparator comparator2
      StackMap locals:
      StackMap stack:
         5: aload 1 /* elements */
            instanceof com.google.common.collect.SortedIterable
            ifeq 8
         6: .line 43
            aload 1 /* elements */
            checkcast com.google.common.collect.SortedIterable
            invokeinterface com.google.common.collect.SortedIterable.comparator:()Ljava/util/Comparator;
            astore 2 /* comparator2 */
        start local 2 // java.util.Comparator comparator2
         7: .line 44
            goto 9
        end local 2 // java.util.Comparator comparator2
         8: .line 45
      StackMap locals:
      StackMap stack:
            iconst_0
            ireturn
        start local 2 // java.util.Comparator comparator2
         9: .line 47
      StackMap locals: java.util.Comparator
      StackMap stack:
            aload 0 /* comparator */
            aload 2 /* comparator2 */
            invokeinterface java.util.Comparator.equals:(Ljava/lang/Object;)Z
            ireturn
        end local 2 // java.util.Comparator comparator2
        end local 1 // java.lang.Iterable elements
        end local 0 // java.util.Comparator comparator
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0   10     0   comparator  Ljava/util/Comparator<*>;
            0   10     1     elements  Ljava/lang/Iterable<*>;
            4    5     2  comparator2  Ljava/util/Comparator<*>;
            7    8     2  comparator2  Ljava/util/Comparator<*>;
            9   10     2  comparator2  Ljava/util/Comparator<*>;
    Signature: (Ljava/util/Comparator<*>;Ljava/lang/Iterable<*>;)Z
    MethodParameters:
            Name  Flags
      comparator  
      elements    

  public static <E> java.util.Comparator<? super E> comparator(java.util.SortedSet<E>);
    descriptor: (Ljava/util/SortedSet;)Ljava/util/Comparator;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=1, locals=2, args_size=1
        start local 0 // java.util.SortedSet sortedSet
         0: .line 53
            aload 0 /* sortedSet */
            invokeinterface java.util.SortedSet.comparator:()Ljava/util/Comparator;
            astore 1 /* result */
        start local 1 // java.util.Comparator result
         1: .line 54
            aload 1 /* result */
            ifnonnull 3
         2: .line 55
            invokestatic com.google.common.collect.Ordering.natural:()Lcom/google/common/collect/Ordering;
            astore 1 /* result */
         3: .line 57
      StackMap locals: java.util.Comparator
      StackMap stack:
            aload 1 /* result */
            areturn
        end local 1 // java.util.Comparator result
        end local 0 // java.util.SortedSet sortedSet
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    4     0  sortedSet  Ljava/util/SortedSet<TE;>;
            1    4     1     result  Ljava/util/Comparator<-TE;>;
    Signature: <E:Ljava/lang/Object;>(Ljava/util/SortedSet<TE;>;)Ljava/util/Comparator<-TE;>;
    MethodParameters:
           Name  Flags
      sortedSet  
}
SourceFile: "SortedIterables.java"
    RuntimeInvisibleAnnotations: 
      com.google.common.annotations.GwtCompatible()