import ( "github.com/codedellemc/libstorage/api/types" ) func someFunction(ctx types.Context) error { // Add a key-value pair to the logging context ctx.WithField("foo", "bar") // Perform some action err := doSomething() if err != nil { return ctx.Err(err) } return nil }In this example, the `WithField` method is used to add a key-value pair "foo:bar" to the logging context. Later on, the `Err` method is used to return the error along with the logging context. This package library provides types for libStorage, an open-source, platform-agnostic storage orchestration platform.