public void setSourceIds(java.util.Collection<String> sourceIds) {
        if (sourceIds == null) {
            this.sourceIds = null;
            return;
        }

        this.sourceIds = new java.util.ArrayList<String>(sourceIds);
    }
<p>
The list of identifiers of the event sources for which events are returned. If not specified, then all sources
are included in the response. An identifier must begin with a letter and must contain only ASCII letters, digits,
and hyphens; it can't end with a hyphen or contain two consecutive hyphens.
</p>
<p>
Constraints:
</p>
<ul>
<li>
<p>
If SourceIds are supplied, SourceType must also be provided.
</p>
</li>
<li>
<p>
If the source type is a DB instance, then a <code>DBInstanceIdentifier</code> must be supplied.
</p>
</li>
<li>
<p>
If the source type is a DB security group, a <code>DBSecurityGroupName</code> must be supplied.
</p>
</li>
<li>
<p>
If the source type is a DB parameter group, a <code>DBParameterGroupName</code> must be supplied.
</p>
</li>
<li>
<p>
If the source type is a DB snapshot, a <code>DBSnapshotIdentifier</code> must be supplied.
</p>
</li>
</ul>

@param sourceIds
       The list of identifiers of the event sources for which events are returned. If not specified, then all
       sources are included in the response. An identifier must begin with a letter and must contain only ASCII
       letters, digits, and hyphens; it can't end with a hyphen or contain two consecutive hyphens.</p>
       <p>
       Constraints:
       </p>
       <ul>
       <li>
       <p>
       If SourceIds are supplied, SourceType must also be provided.
       </p>
       </li>
       <li>
       <p>
       If the source type is a DB instance, then a <code>DBInstanceIdentifier</code> must be supplied.
       </p>
       </li>
       <li>
       <p>
       If the source type is a DB security group, a <code>DBSecurityGroupName</code> must be supplied.
       </p>
       </li>
       <li>
       <p>
       If the source type is a DB parameter group, a <code>DBParameterGroupName</code> must be supplied.
       </p>
       </li>
       <li>
       <p>
       If the source type is a DB snapshot, a <code>DBSnapshotIdentifier</code> must be supplied.
       </p>
       </li>
aws-java-sdk-neptune/src/main/java/com/amazonaws/services/neptune/model/CreateEventSubscriptionRequest.java