Defined in github.com/aws/aws-sdk-go/service/rds/api.go
The identifier of the event source for which events will be returned. If not specified, then all sources are included in the response.
If SourceIdentifier is supplied, SourceType must also be provided. If the source type is DBInstance, then a DBInstanceIdentifier must be
If the source type is DBSecurityGroup, a DBSecurityGroupName must be supplied. If the source type is DBParameterGroup, a DBParameterGroupName must be
If the source type is DBSnapshot, a DBSnapshotIdentifier must be supplied. Cannot end with a hyphen or contain two consecutive hyphens.