Function pre_eval_save_image 

fn pre_eval_save_image(
    args: &[Arg],
    env: &Environment,
    context: &BuiltinContext<'_>,
) -> Result<RValue, RError>

Save all objects in the global environment to “.RData”.

Equivalent to save(list = ls(envir = .GlobalEnv), file = ".RData").

@param file character scalar: path to write (default “.RData”) @return NULL (invisibly)