port writer and tests, but does not pass

src/datamatrix/encoder/symbol_info.rs

@@ -65,8 +65,8 @@ pub struct SymbolInfo {
     rectangular: bool,
     dataCapacity: u32,
     errorCodewords: u32,
-    matrixWidth: u32,
-    matrixHeight: u32,
+    pub(crate) matrixWidth: u32,
+    pub(crate) matrixHeight: u32,
     dataRegions: u32,
     rsBlockData: i32,
     rsBlockError: u32,