docs: def _get_block_storage(kwargs):
      '''
      Construct a block storage instance from passed arguments
      '''
      if kwargs is None:
          kwargs = {}
  
      block_storage_name = kwargs.get('name', None)
      block_storage_size = kwargs.get('size', None)
      block_storage_description = kwargs.get('description', None)
      datacenter_id = kwargs.get('datacenter_id', None)
      server_id = kwargs.get('server_id', None)
  
      block_storage = BlockStorage(
          name=block_storage_name,
          size=block_storage_size)
  
      if block_storage_description:
          block_storage.description = block_storage_description
  
      if datacenter_id:
          block_storage.datacenter_id = datacenter_id
  
      if server_id:
          block_storage.server_id = server_id
  
      return block_storage