def __init__(self, protoClass, bucketFilter):
        """
        Tell me what to wrap and where to get buckets.

        @param protoClass: The class of C{Protocol} this will generate
          wrapped instances of.
        @type protoClass: L{Protocol<twisted.internet.interfaces.IProtocol>}
          class
        @param bucketFilter: The filter which will determine how
          traffic is shaped.
        @type bucketFilter: L{HierarchicalBucketFilter}.
        """
        # More precisely, protoClass can be any callable that will return
        # instances of something that implements IProtocol.
        self.protocol = protoClass
        self.bucketFilter = bucketFilter

        Tell me what to wrap and where to get buckets.

        @param protoClass: The class of C{Protocol} this will generate
          wrapped instances of.
        @type protoClass: L{Protocol<twisted.internet.interfaces.IProtocol>}
          class
        @param bucketFilter: The filter which will determine how
          traffic is shaped.
        @type bucketFilter: L{HierarchicalBucketFilter}.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/protocols/htb.py