References: syscall.SYS_FSTAT64

const syscall.SYS_FSTAT64_EXTENDED

one use

	syscall (current package)
		zsysnum_darwin_arm64.go#L270: 	SYS_FSTAT64_EXTENDED               = 343

The pages are generated with Golds v0.2.8-preview. (GOOS=darwin GOARCH=arm64)