@return [Array<Hash>] Returns a list of hashes. Each hash
contains information about one message that failed to change visibility. Hash keys include: * `:error_code` * `:error_message` * `:sender_fault` * `:receipt_handle`
@return [Array<Queue::SentMessage>] Returns a list of
{Queue::SentMessage} objects.
# File lib/aws/sqs/errors.rb, line 77 def initialize sent, failures @sent = sent @failures = failures super("Failed to send #{failures.size} messages") end