Hello, im working on an existing project, and in this project contentService.createContentItemQuery is used. My problem is that the application isn’t doing it’s job right now, and i can’t seem to find any documentation on this part of the flowable API, i have checked both http://www.flowable.org/docs/javadocs-5/index.html and http://www.flowable.org/docs/javadocs/index.html. If im looking on the wrong site, can you please direct me to the correct one 
Best regards, Martin
Seems like there is no documentation of the content engine. Therefore I created https://github.com/flowable/flowable-engine/issues/556 some time ago.