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Java library for Azure Service Bus

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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.

package com.microsoft.azure.servicebus;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;

import com.microsoft.azure.servicebus.primitives.ServiceBusException;

public final class Utils {

    public static  T completeFuture(CompletableFuture future) throws InterruptedException, ServiceBusException {
        try {
            return future.get();
        } catch (InterruptedException ie) {
            // Rare instance
            throw ie;
        } catch (ExecutionException ee) {
            Throwable cause = ee.getCause();
            if (cause instanceof RuntimeException) {
                throw (RuntimeException) cause;
            } else if (cause instanceof Error) {
                throw (Error) cause;
            } else if (cause instanceof ServiceBusException) {
                throw (ServiceBusException) cause;
            } else {
                throw new ServiceBusException(true, cause);
            }
        }
    }

    static void assertNonNull(String argumentName, Object argument) {
        if (argument == null) {
            throw new IllegalArgumentException("Argument '" + argumentName + "' is null.");
        }
    }
    
    static MessageBody fromSequence(List