code: func looksLikeVersion0(src []byte) bool {
  	// Version 0 files begin with the magic prefix "tfstate".
  	const magic = "tfstate"
  	if len(src) < len(magic) {
  		// Not even long enough to have the magic prefix
  		return false
  	}
  	if string(src[0:len(magic)]) == magic {
  		return true
  	}
  	return false
  }
docs: // looksLikeVersion0 sniffs for the signature indicating a version 0 state
  // file.
  //
  // Version 0 was the number retroactively assigned to Terraform's initial
  // (unversioned) binary state file format, which was later superseded by the
  // version 1 format in JSON.
  //
  // Version 0 is no longer supported, so this is used only to detect it and
  // return a nice error to the user.