pub unsafe extern "C" fn BNProjectFolderExport(
folder: *mut BNProjectFolder,
destination: *const c_char,
ctxt: *mut c_void,
progress: BNProgressFunction,
) -> bool
pub unsafe extern "C" fn BNProjectFolderExport(
folder: *mut BNProjectFolder,
destination: *const c_char,
ctxt: *mut c_void,
progress: BNProgressFunction,
) -> bool