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. 
class com.google.common.graph.StandardValueGraph$1 extends com.google.common.graph.IncidentEdgeSet<N>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.google.common.graph.StandardValueGraph$1
  super_class: com.google.common.graph.IncidentEdgeSet
{
  final com.google.common.graph.StandardValueGraph this$0;
    descriptor: Lcom/google/common/graph/StandardValueGraph;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  private final com.google.common.graph.GraphConnections val$connections;
    descriptor: Lcom/google/common/graph/GraphConnections;
    flags: (0x1012) ACC_PRIVATE, ACC_FINAL, ACC_SYNTHETIC

  void <init>(com.google.common.graph.StandardValueGraph, com.google.common.graph.BaseGraph, java.lang.Object, com.google.common.graph.GraphConnections);
    descriptor: (Lcom/google/common/graph/StandardValueGraph;Lcom/google/common/graph/BaseGraph;Ljava/lang/Object;Lcom/google/common/graph/GraphConnections;)V
    flags: (0x0000) 
    Code:
      stack=3, locals=5, args_size=5
        start local 0 // com.google.common.graph.StandardValueGraph$1 this
        start local 2 // com.google.common.graph.BaseGraph $anonymous0
        start local 3 // java.lang.Object $anonymous1
         0: .line 122
            aload 0 /* this */
            aload 1
            putfield com.google.common.graph.StandardValueGraph$1.this$0:Lcom/google/common/graph/StandardValueGraph;
            aload 0 /* this */
            aload 4
            putfield com.google.common.graph.StandardValueGraph$1.val$connections:Lcom/google/common/graph/GraphConnections;
            aload 0 /* this */
            aload 2 /* $anonymous0 */
            aload 3 /* $anonymous1 */
            invokespecial com.google.common.graph.IncidentEdgeSet.<init>:(Lcom/google/common/graph/BaseGraph;Ljava/lang/Object;)V
            return
        end local 3 // java.lang.Object $anonymous1
        end local 2 // com.google.common.graph.BaseGraph $anonymous0
        end local 0 // com.google.common.graph.StandardValueGraph$1 this
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0    1     0         this  Lcom/google/common/graph/StandardValueGraph$1;
            0    1     2  $anonymous0  Lcom/google/common/graph/BaseGraph<TN;>;
            0    1     3  $anonymous1  TN;
    MethodParameters:
                 Name  Flags
      this$0           final
      $anonymous0      
      $anonymous1      
      val$connections  final

  public java.util.Iterator<com.google.common.graph.EndpointPair<N>> iterator();
    descriptor: ()Ljava/util/Iterator;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // com.google.common.graph.StandardValueGraph$1 this
         0: .line 125
            aload 0 /* this */
            getfield com.google.common.graph.StandardValueGraph$1.val$connections:Lcom/google/common/graph/GraphConnections;
            aload 0 /* this */
            getfield com.google.common.graph.StandardValueGraph$1.node:Ljava/lang/Object;
            invokeinterface com.google.common.graph.GraphConnections.incidentEdgeIterator:(Ljava/lang/Object;)Ljava/util/Iterator;
            areturn
        end local 0 // com.google.common.graph.StandardValueGraph$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/graph/StandardValueGraph$1;
    Signature: ()Ljava/util/Iterator<Lcom/google/common/graph/EndpointPair<TN;>;>;
}
Signature: Lcom/google/common/graph/IncidentEdgeSet<TN;>;
SourceFile: "StandardValueGraph.java"
EnclosingMethod: com.google.common.graph.StandardValueGraph.incidentEdges:(Ljava/lang/Object;)Ljava/util/Set;
NestHost: com.google.common.graph.StandardValueGraph
InnerClasses:
  com.google.common.graph.StandardValueGraph$1