# Functions
GetOpencensusSpanContextFromContext get opencensus.trace.SpanContext from context.Context.
GetSpanContextFromContext get opentracing.SpanContext from context.Context.
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RegisterCodec register customized codec.
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# Constants
AuthKey is used in metadata.
DefaultRPCPath is used by ServeHTTP.
OpencensusSpanClientKey key in client context.
OpencensusSpanRequestKey span key in request meta.
OpencensusSpanServerKey key in service context.
OpentracingSpanClientKey key in client context.
OpentracingSpanServerKey key in service context.
# Variables
Codecs are codecs supported by rpcx.
ReqMetaDataKey is used to set metatdata in context of requests.
ResMetaDataKey is used to set metatdata in context of responses.
# Type aliases
ContextKey defines key type in context.