Function builtin_deparse1 

fn builtin_deparse1(
    args: &[RValue],
    named: &[(String, RValue)],
) -> Result<RValue, RError>

Single-string deparse (R 4.0+). Collapses multi-line deparse output.

@param expr any R value or language object @param collapse character: separator for joining lines (default “ “) @return character scalar