Imports go.opentelemetry.io/collector/pdata/pcommon go.opentelemetry.io/collector/pdata/pmetric go.opentelemetry.io/collector/pdata/pmetric/pmetricotlp go.opentelemetry.io/collector/pdata/ptrace go.opentelemetry.io/collector/pdata/ptrace/ptraceotlp golang.org/x/exp/slog Standard library imports context io net/http net/http/httptest net/url os