feat(metrics/family): 🍬 contains() checks if metrics exist
#245
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this commit introduces a small accessor to the `Family<S, M, C>` metric family type. this new `contains()` method allows callers to check whether or not a metric with the provided set of labels exists. if no metric has been created via e.g. `get_or_create()`, this method will return `false`. Signed-off-by: katelyn martin <[email protected]>
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this commit introduces a `len()` method to `Family<S, M, C>`, which returns the number of series within a metric family. see also prometheus#245, which allows callers to check if a family `contains()` a given label set. Signed-off-by: katelyn martin <[email protected]>
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this commit introduces a small accessor to the
Family<S, M, C>metric family type. this newcontains()method allows callers to check whether or not a metric with the provided set of labels exists.if no metric has been created via e.g.
get_or_create(), this method will returnfalse.