@Override
    public Object getValue(final Object context) throws EvaluationException {
        return this.flowDefinitionRegistry.getFlowDefinition(this.subflowId);
    }
Creates a custom subflow expression.

@author Misagh Moayyed
@since 4.2
core/cas-server-core-webflow-api/src/main/java/org/apereo/cas/web/flow/configurer/BasicSubflowExpression.java