A list with the following syntax:
list(
ArchiveArn = "string",
ArchiveName = "string",
EventSourceArn = "string",
Description = "string",
EventPattern = "string",
State = "ENABLED"|"DISABLED"|"CREATING"|"UPDATING"|"CREATE_FAILED"|"UPDATE_FAILED",
StateReason = "string",
RetentionDays = 123,
SizeBytes = 123,
EventCount = 123,
CreationTime = as.POSIXct(
"2015-01-01"
)
)