Function print 

pub fn print(
    program: &TsProgram,
    source_name: &str,
    source_text: &str,
    output_file: &str,
) -> Printed

Print program to TypeScript text. source_name/source_text register the .bynk source every statement’s own span is measured against — today always exactly one, since nothing spans two files yet; output_file names the generated file in the source map’s own file field. Only a top-level statement’s own span is recorded as a checkpoint (R7.4’s existing scope, unchanged by P7.8 — see TsStmt::span’s own doc for why a nested statement’s span isn’t recorded yet).