Function pio_package_lower_multiconductor_to_balanced 

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

Lower a multiconductor package to a new balanced package. Call pio_package_multiconductor_to_balanced_preflight_json first when the caller needs structured blockers for unsupported inputs. base_mva is the three phase system power base used for the balanced per-unit projection.