flowElementGraph = createFlowElementGraph( flowDef, tails );
writeTracePlan( nameOrID, "0-initial-flow-element-graph", flowElementGraph );
ruleExec.enableTransformTracing( transformPath );
PlannerContext plannerContext = new PlannerContext( ruleRegistry, this, flowDef, flow, transformPath != null );
RuleResult ruleResult = ruleExec.exec( plannerContext, flowElementGraph );