Custom analyzer group

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Did anybody try to write a custom AnalyzerGroup by inheriting it?
Is it even possible?

Here is my yaml file:

sensors: 
  type: diagnostic_aggregator/CustomAnalyzerGroup
  path: Sensors
  analyzers:
    test:
      type: /diagnostic_aggregator/GenericAnalyzer
      path: ''

and this is the error I'm getting when trying to run the diagnostic aggregator:

[ERROR] [1501599137.540867877]: No analyzers initialized in AnalyzerGroup /diagnostic_aggregator/analyzers
[ERROR] [1501599137.540891065]: Analyzer group for diagnostic aggregator failed to initialize!