Function CGPDFDocumentGetVersion 

pub unsafe extern "C-unwind" fn CGPDFDocumentGetVersion(
    document: Option<&CGPDFDocument>,
    major_version: NonNull<c_int>,
    minor_version: NonNull<c_int>,
)

👎Deprecated: renamed to CGPDFDocument::version

Available on crate feature CGPDFDocument only.