def getMetricFromFrozenRegistry(self, metric_name, frozen_registry,<EOL>**labels):
for metric in frozen_registry:<EOL><INDENT>for n, l, value in metric.samples:<EOL><INDENT>if n == metric_name and l == labels:<EOL><INDENT>return value<EOL><DEDENT><DEDENT><DEDENT>
Gets a single metric from a frozen registry.