log.debug(depthSpaces(stack.size()) + "<= " + executionFlow + " #"
+ getCurrentStackUuid() + ", depth=" + stack.size());
ExecutionFlowRuntime leftEf = stack.pop();
log.debug(depthSpaces(stack.size()) + "<= " + executionFlow + " #"
+ getCurrentStackUuid() + ", depth=" + stack.size());
ExecutionFlowRuntime leftEf = stack.pop();