class Aws::S3::EncryptionV2::KmsCipherProvider

def validate_key_for_encryption
  if @kms_key_id == :kms_allow_decrypt_with_any_cmk
    raise ArgumentError, 'Unable to encrypt/write objects with '\
      'kms_key_id = :kms_allow_decrypt_with_any_cmk.  Provide ' \
      'a valid kms_key_id on client construction.'
  end
end