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. 
public interface com.google.common.graph.Graph<N> extends com.google.common.graph.BaseGraph<N>
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.google.common.graph.Graph
  super_class: java.lang.Object
{
  public abstract java.util.Set<N> nodes();
    descriptor: ()Ljava/util/Set;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: ()Ljava/util/Set<TN;>;

  public abstract java.util.Set<com.google.common.graph.EndpointPair<N>> edges();
    descriptor: ()Ljava/util/Set;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: ()Ljava/util/Set<Lcom/google/common/graph/EndpointPair<TN;>;>;

  public abstract boolean isDirected();
    descriptor: ()Z
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract boolean allowsSelfLoops();
    descriptor: ()Z
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract com.google.common.graph.ElementOrder<N> nodeOrder();
    descriptor: ()Lcom/google/common/graph/ElementOrder;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: ()Lcom/google/common/graph/ElementOrder<TN;>;

  public abstract java.util.Set<N> adjacentNodes(N);
    descriptor: (Ljava/lang/Object;)Ljava/util/Set;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (TN;)Ljava/util/Set<TN;>;
    MethodParameters:
      Name  Flags
      node  

  public abstract java.util.Set<N> predecessors(N);
    descriptor: (Ljava/lang/Object;)Ljava/util/Set;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (TN;)Ljava/util/Set<TN;>;
    MethodParameters:
      Name  Flags
      node  

  public abstract java.util.Set<N> successors(N);
    descriptor: (Ljava/lang/Object;)Ljava/util/Set;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (TN;)Ljava/util/Set<TN;>;
    MethodParameters:
      Name  Flags
      node  

  public abstract java.util.Set<com.google.common.graph.EndpointPair<N>> incidentEdges(N);
    descriptor: (Ljava/lang/Object;)Ljava/util/Set;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (TN;)Ljava/util/Set<Lcom/google/common/graph/EndpointPair<TN;>;>;
    MethodParameters:
      Name  Flags
      node  

  public abstract int degree();
    descriptor: (Ljava/lang/Object;)I
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (TN;)I
    MethodParameters:
      Name  Flags
      node  

  public abstract int inDegree();
    descriptor: (Ljava/lang/Object;)I
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (TN;)I
    MethodParameters:
      Name  Flags
      node  

  public abstract int outDegree();
    descriptor: (Ljava/lang/Object;)I
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (TN;)I
    MethodParameters:
      Name  Flags
      node  

  public abstract boolean hasEdgeConnecting(N, );
    descriptor: (Ljava/lang/Object;Ljava/lang/Object;)Z
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (TN;TN;)Z
    MethodParameters:
       Name  Flags
      nodeU  
      nodeV  

  public abstract boolean equals(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Z
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    RuntimeVisibleTypeAnnotations: 
      METHOD_FORMAL_PARAMETER
        org.checkerframework.checker.nullness.qual.Nullable()
    MethodParameters:
        Name  Flags
      object  

  public abstract int hashCode();
    descriptor: ()I
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public java.lang.Iterable predecessors(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Ljava/lang/Iterable;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=2, locals=2, args_size=2
         0: .line 1
            aload 0
            aload 1
            checkcast java.lang.Object
            invokeinterface com.google.common.graph.Graph.predecessors:(Ljava/lang/Object;)Ljava/util/Set;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public java.lang.Iterable successors(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Ljava/lang/Iterable;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=2, locals=2, args_size=2
         0: .line 1
            aload 0
            aload 1
            checkcast java.lang.Object
            invokeinterface com.google.common.graph.Graph.successors:(Ljava/lang/Object;)Ljava/util/Set;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: <N:Ljava/lang/Object;>Ljava/lang/Object;Lcom/google/common/graph/BaseGraph<TN;>;
SourceFile: "Graph.java"
    RuntimeInvisibleAnnotations: 
      com.google.common.annotations.Beta()