The context of a span, attached to
Exemplars][google.api.Distribution.Exemplars] in
Distribution][google.api.Distribution] values during aggregation. It
contains the name of a span with format: ::
projects/[PROJECT_ID_OR_NUMBER]/traces/[TRACE_ID]/spans/[SPAN_ID]
.. attribute:: span_name
The resource name of the span. The format is: :: project
s/[PROJECT_ID_OR_NUMBER]/traces/[TRACE_ID]/spans/[SPAN_ID]
[TRACE_ID] is a unique identifier for a trace within a
project; it is a 32-character hexadecimal encoding of a
16-byte array. [SPAN_ID] is a unique identifier for a
span within a trace; it is a 16-character hexadecimal encoding
of an 8-byte array.
