xmpp-httpx - v0.11.0
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    Variable HTTP_METHODSConst

    HTTP_METHODS: readonly [
        "OPTIONS",
        "GET",
        "HEAD",
        "POST",
        "PUT",
        "DELETE",
        "TRACE",
        "PATCH",
        "CONNECT",
    ] = ...

    CONNECT is a deliberate departure from XEP-0332 v0.5.1, whose method list stops at PATCH — see docs/protocol-notes.md. Without it a tunnel cannot be requested at all, and the alternative (a private method name) would be a larger deviation than reusing the one HTTP already has.