Function mlir_sys::mlirRegionInsertOwnedBlock

pub unsafe extern "C" fn mlirRegionInsertOwnedBlock(
    region: MlirRegion,
    pos: isize,
    block: MlirBlock
)

Takes a block owned by the caller and inserts it at pos to the given region. This is an expensive operation that linearly scans the region, prefer insertAfter/Before instead.