|  | @@ -44,7 +44,6 @@ some configuration as environment variables that can be set.
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				|  |  |    - channel - traces operations on the C core channel stack
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				|  |  |    - client_channel - traces client channel activity, including resolver
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				|  |  |      and load balancing policy interaction
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				|  |  | -  - combiner - traces combiner lock state
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				|  |  |    - compression - traces compression operations
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				|  |  |    - connectivity_state - traces connectivity state changes to channels
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				|  |  |    - executor - traces grpc's internal thread pool ('the executor')
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				|  | @@ -79,6 +78,7 @@ some configuration as environment variables that can be set.
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				|  |  |    accomplished by invoking `CONFIG=dbg make <target>`
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				|  |  |    - alarm_refcount - refcounting traces for grpc_alarm structure
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				|  |  |    - metadata - tracks creation and mutation of metadata
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				|  |  | +  - combiner - traces combiner lock state
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				|  |  |    - closure - tracks closure creation, scheduling, and completion
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				|  |  |    - pending_tags - traces still-in-progress tags on completion queues
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				|  |  |    - polling - traces the selected polling engine
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