All child nodes of ServiceManager

When I checked the source code of some of the dictionary extensions, I found that ServiceManager node is followed by other nodes like “Dictionaries”, “GrammerCheckers” etc. in .xcu file like dictionaries.xcu

 <node oor:name="ServiceManager">
    <node oor:name="Dictionaries">

Or something like this…

 <node oor:name="ServiceManager">
    <node oor:name="GrammarCheckers">

Where will I get the list of all child nodes of ServiceManager ?

What do you actually want to achieve? Arbitrary services do not make sense in a dictionaries.xcu file. The ServiceManager is responsible for creating any service the LibreOffice UNO API can serve, that is basically all from LibreOffice: Class Index that are not structs/enums/constants/exceptions and do not start with an X, which are interfaces exported by services.