Function pio_package_multiconductor_to_balanced_preflight_json 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn pio_package_multiconductor_to_balanced_preflight_json(
    pkg: *const PioPackage,
    base_mva: f64,
    errbuf: *mut c_char,
    errlen: usize,
) -> *mut c_char

Return the multiconductor-to-balanced lowering preflight report as JSON. base_mva is the three phase system power base used for the balanced per-unit projection. Returns NULL if the package is not multiconductor.