使用neo4j java API查找具有给定标签和属性的所有节点

I know about the findNodesByLabelAndProperty method of the GraphDatabaseServiceObject, but that method requires a value parameter. In my case, I only want to know if there are any (1 or more) nodes in my database that have a specified label and property, but I don't know anything about the value of the property other than it's type. Any ideas?I know about the findNodesByLabelAndProperty me