%3:3 = tf_executor.Merge %2#0, %0#0 : tensor<*x!tf_type.int32ref> {device = "", N = 2, T = "tfdtype$DT_INT32"} loc("while/Merge")
    %4:2 = tf_executor.island(%3#2) wraps "tf.Const"() {device = "", dtype = "tfdtype$DT_INT32", value = dense<10> : tensor<i32>} : () -> tensor<i32> loc("while/Less/y")

        // given
        mockGitOperation(listOf("git", "fetch", "origin", "master", "release"), "")
        mockGitOperation(listOf("git", "merge-base", "origin/master", "HEAD"), "master-fork-point")
        mockGitOperation(listOf("git", "merge-base", "origin/release", "HEAD"), "release-fork-point")
        mockGitOperation(listOf("git", "show", "master-fork-point:version.txt"), "5.1")

		t.Run(scenario.name, func(t *testing.T) {
			err := scenario.primaryRegistry.Merge(scenario.registryToMerge)

			if (err == nil) == scenario.shouldError {
				t.Errorf("Merge() shouldError is: %v, however err is: %v.", scenario.shouldError, err)
				return
			}

			if !isRegistryEqual(scenario.expected, scenario.primaryRegistry) {
				t.Errorf("Merge(). Expected %v. Got %v instead.", scenario.expected, scenario.primaryRegistry)
			}

  Operation* const insert_point;

  // The set of islands that are to be merged together.
  SmallVector<IslandOp> islands;
};

// This structure contains all of the merge decisions for islands within a
// graph. We compute which islands to merge first, so that we don't need to
// recursively mutate the IR (resulting in quadratic behavior when moving
// operations). A rough sketch of the coarsening algorithm is shown below:
//

    }

    public void merge(ArtifactMetadata metadata) {
        ProjectArtifactMetadata m = (ProjectArtifactMetadata) metadata;
        if (!m.file.equals(file)) {
            throw new IllegalStateException("Cannot add two different pieces of metadata for: " + getKey());
        }
    }

    public void merge(org.apache.maven.repository.legacy.metadata.ArtifactMetadata metadata) {

// dedicated to.
type PatchType string

const (
	JSONPatchType           PatchType = "application/json-patch+json"
	MergePatchType          PatchType = "application/merge-patch+json"
	StrategicMergePatchType PatchType = "application/strategic-merge-patch+json"
	ApplyPatchType          PatchType = "application/apply-patch+yaml"

    ProjectBuildingRequest setRepositorySession(RepositorySystemSession repositorySession);

    /**
     * Sets the merge mode used to combine repositories declared in the POM with the repositories specified in this
     * request.
     *
     * @param mode The repository merge mode, must not be {@code null}.
     * @return This request for chaining, never {@code null}.
     * @see #setRemoteRepositories(List)
     */

git branch -m master
git branch b

git add v0.2.1
git commit -m 'v0.2.1'
git tag 'v0.2.1'

git checkout b
git add 'v0.2.2'
git commit -m 'v0.2.2'
git tag 'v0.2.2'

git checkout master
git merge b -m 'merge'

git show-ref --tags --heads
cmp stdout .git-refs

-- .git-refs --
59356c8cd18c5fe9a598167d98a6843e52d57952 refs/heads/b
c7818c24fa2f3f714c67d0a6d3e411c85a518d1f refs/heads/master

    value {
      type: DT_FLOAT
    }
  }
  attr {
    key: "_class"
    value {
      list {
        s: "loc:@Const"
      }
    }
  }
}
node {
  name: "cond/Merge"
  op: "Merge"
  input: "cond/Add"
  input: "cond/MatMul"
  attr {
    key: "N"
    value {
      i: 2
    }
  }
  attr {
    key: "T"
    value {
      type: DT_FLOAT
    }
  }

  ops::internal::Enter enter(s.WithOpName("init_value"), init_value, loop_name);
  ops::Merge merge(s.WithOpName("merge"), {init_value, init_value});
  Output next_iteration =
      ops::NextIteration(s.WithOpName("next_itr"), merge.output);
  return s.graph()->UpdateEdge(next_iteration.node(), 0, merge.output.node(),
                               1);
}

TEST(NodesRelatedToRefVariables, Cycles) {