| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/prometheus/client_golang/prometheus/testutil | Package testutil provides helpers to test code using the prometheus package of client_golang. |
| github.com/prometheus/common/expfmt | Package expfmt contains tools for reading and writing Prometheus metrics. |
| github.com/prometheus/common/model | Package model contains common data structures that are shared across Prometheus components and libraries. |
| io | Package io provides basic interfaces to I/O primitives. |
| k8s.io/component-base/metrics | |
| reflect | Package reflect implements run-time reflection, allowing a program to manipulate objects with arbitrary types. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |