Function mlirFreezeRewritePattern 

pub unsafe extern "C" fn mlirFreezeRewritePattern(
    set: MlirRewritePatternSet,
) -> MlirFrozenRewritePatternSet

Freeze the given MlirRewritePatternSet to a MlirFrozenRewritePatternSet. Note that the ownership of the input set is transferred into the frozen set after this call.