Function pio_package_materialize_study_commit 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn pio_package_materialize_study_commit(
    pkg: *const PioPackage,
    index: i64,
    errbuf: *mut c_char,
    errlen: usize,
) -> *mut PioPackage

Materialize one study commit into a new static package.

The returned handle owns a package with commits 0..=index applied and no operating point series or study block. Free it with pio_package_free.