/**
   * Removes {@code edge} from this network, if it is present.
   *
   * @return {@code true} if the network was modified as a result of this call
   */
  @CanIgnoreReturnValue
  boolean removeEdge(E edge);

  public void removeEdge_existingSelfLoopEdge() {
    assume().that(graphIsMutable()).isTrue();
    assume().that(network.allowsSelfLoops()).isTrue();

    addEdge(N1, N1, E11);
    assertThat(networkAsMutableNetwork.removeEdge(E11)).isTrue();
    assertThat(network.edges()).doesNotContain(E11);
    assertThat(network.edgesConnecting(N1, N1)).isEmpty();
  }

getVerticies(); public java.util.Set getLabels(); public Vertex addVertex(String); public void addEdge(String, String) throws CycleDetectedExcepti; public void addEdge(Vertex, Vertex) throws CycleDetectedExcepti; public void removeEdge(String, String); public void removeEdge(Vertex, Vertex); public Vertex getVertex(String); public boolean hasEdge(String, String); public java.util.List getChildLabels(String); public java.util.List getParentLabels(String); public Object clone() throws CloneNotSupportedExc;...