/**
@brief Returns the root scope of the CTF IR field path \p field_path.
@param[in] field_path Field path of which to get the root scope.
@returns Root scope of \p field_path, or
/**
@brief Returns the root scope of the CTF IR field path \p field_path.
@param[in] field_path Field path of which to get the root scope.
@returns Root scope of \p field_path, or