Const ExperimentalThis metric should be reported for each vcs.line_change.type value. For example if a ref added 3 lines and removed 2 lines,
instrumentation SHOULD report two measurements: 3 and 2 (both positive numbers).
If number of lines added/removed should be calculated from the start of time, then vcs.ref.base.name SHOULD be set to an empty string.
This metric is experimental and is subject to breaking changes in minor releases of @opentelemetry/semantic-conventions.
The number of lines added/removed in a ref (branch) relative to the ref from the
vcs.ref.base.nameattribute.