Gets and sets the property SourceType. 
            
The type of source that will be generating the events. For example, if you want to be notified of events generated by a cluster, you would set this parameter to cluster. If this value is not specified, events are returned for all Amazon Redshift objects in your AWS account. You must specify a source type in order to specify source IDs.
Valid values: cluster, cluster-parameter-group, cluster-security-group, and cluster-snapshot.
 Declaration Syntax
 Declaration Syntax| C# | 
public string SourceType { get; set; }