How to get files attached to a task in Alfresco?

Question

Java

In general, I started to deal with the alfresco, but I still don’t really understand how to get the files attached to the task. There are "samples" in the docks, if you can call it that, for getting a list of files, for example:

List<ChildAssociationRef> children = nodeService.getChildAssocs(companyHome)

but here the question arises: what is CompanyHome. To do this, let's look at the NodeService docs, and what we see there:

getChildAssocs(NodeRef nodeRef, QNamePattern typeQNamePattern, QNamePattern qnamePattern)

OK. But I already want to get all NodeRefs using getChildAssocs. Apparently, NodeRef is implied by a level an order of magnitude higher, like a folder, only NodeRef. Ok, but how, in turn, to get it?