do we need this method here? i would assume that people working with the odm should use the odm query builder now, or else they know how to work with the PHPCR api to build their phpcr-querybuilder.

the risk with having it is that people see this and think its what they should use. for the same reason i suggest dropping createPhpcrQuery. the only thing to keep would be getDocumentsByPhpcrQuery, but it needs to be well documented to understand that usually you just want the normal querybuilder of the odm.