opentelemetry_sdk 0.27.0

The SDK for the OpenTelemetry metrics collection and distributed tracing framework
Documentation 
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# Copyright The OpenTelemetry Authors
# SPDX-License-Identifier: Apache-2.0
# This is used with cargo-check-external-types to reduce the surface area of downstream crates from
# the public API. Ideally this can have a few exceptions as possible.
allowed_external_types = [
    "opentelemetry::*",
    "async_channel::Receiver",
    "async_channel::Sender",
    "async_std::stream::interval::Interval",
    "futures_channel::oneshot::Sender", # TODO: This is a pre-1.0 crate, we can't easily stabilize with this in the public API
    "futures_core::future::BoxFuture", # TODO: This is a pre-1.0 crate, we can't easily stabilize with this in the public API
    "futures_core::stream::Stream", # TODO: This is a pre-1.0 crate, we can't easily stabilize with this in the public API
    "opentelemetry_http::HttpClient", # TODO: We probably shouldn't be depending on another SDK not in the API from the SDK.
    "tokio_stream::wrappers::interval::IntervalStream", # TODO: This is a pre-1.0 crate, we can't easily stabilize with this in the public API
    "tokio_stream::wrappers::mpsc_bounded::ReceiverStream", # TODO: This is a pre-1.0 crate, we can't easily stabilize with this in the public API
    "tokio::sync::mpsc::bounded::Sender",
    "tokio::time::sleep::Sleep",
]