def METHOD_NAME(self, resource_group):
    col = self.create_random_name(prefix='cli', length=15)
    db_name = self.create_random_name(prefix='cli', length=15)
    self.kwargs.update({
        'rg':'cosmosTest',
        'acc': 'mergetest3',
        'db_name': db_name,
        'col': col,
        'loc': 'westus',
        'shard_key': "theShardKey",
        'throughput': "20000"
    })
    # Create database
    self.cmd('az cosmosdb mongodb database create -g {rg} -a {acc} -n {db_name}')       
    # Create collection
    self.cmd('az cosmosdb mongodb collection create -g {rg} -a {acc} -d {db_name} -n {col} --shard {shard_key} --throughput {throughput}')
    #Lower the throughput
    self.cmd('az cosmosdb mongodb collection throughput update -g {rg} -a {acc} -d {db_name} -n {col} --throughput 1000')
    #merge
    merge_info = self.cmd('az cosmosdb mongodb collection merge -g {rg} -a {acc} -d {db_name} -n {col} ').get_output_in_json()
    print(merge_info)