@Override
    public Class getSourceClass() {
        return CompositeFlowExecutionKey.class;
    }
Special converter for the {@link CompositeFlowExecutionKey} to return as a String.

@author Jerome Leleu
@since 4.0.0
core/cas-server-core-webflow-api/src/main/java/org/apereo/cas/web/flow/CompositeFlowExecutionKeyConverter.java