Function lower_blackscholes_source 

pub fn lower_blackscholes_source(
    source: &str,
    p: MapPar,
    pir_args: Option<&str>,
) -> Result<(usize, String, String), String>

A LOGOS Black-Scholes — the zip map whose term is blackscholes_query — emitted as Spatial’s BlackScholes regression app at the knobs p, with the variant’s PIR arguments (pir_args, what its pirArgs override appends): (n, class name, Spatial source), or a typed reason. The columns are loaded in the order the program declares them, as the app loads its own. The class name carries the length and every knob in Spatial’s parameter order.