const crypto/tls.extensionSupportedVersions

5 uses

	crypto/tls (current package)
		common.go#L97: 	extensionSupportedVersions       uint16 = 43
		handshake_messages.go#L223: 				b.AddUint16(extensionSupportedVersions)
		handshake_messages.go#L506: 		case extensionSupportedVersions:
		handshake_messages.go#L675: 				b.AddUint16(extensionSupportedVersions)
		handshake_messages.go#L795: 		case extensionSupportedVersions:

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