Function flake_reference_parse_flags_set_base_directory 

pub unsafe extern "C" fn flake_reference_parse_flags_set_base_directory(
    context: *mut c_context,
    flags: *mut flake_reference_parse_flags,
    baseDirectory: *const c_char,
    baseDirectoryLen: usize,
) -> err

@brief Provide a base directory for parsing relative flake references @param[out] context Optional, stores error information @param[in] flags The flags to modify @param[in] baseDirectory The base directory to add @param[in] baseDirectoryLen The length of baseDirectory @return NIX_OK on success, NIX_ERR on failure