Does grpcurl support pulling a client certificate from the OS X Keychain?

This answer on Stackoverflow describes the following mechanism for using a client certificate from the OSX keychain, which I verified works for me.

CURL_SSL_BACKEND=secure-transport curl --cert "My Cert" https://10.0.1.101/

Is there an equivalent option or env var in grpcurl that allows it to pull a client certificate from the OSX keychain?

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