Implement example block and export block.

src/wasm/src_block.rs

@@ -36,13 +36,13 @@ pub struct WasmSrcBlock {
 
 #[derive(Debug, Serialize, Deserialize)]
 #[serde(untagged)]
-enum WasmRetainLabels {
+pub(crate) enum WasmRetainLabels {
     YesNo(bool),
     Keep(CharOffsetInLine),
 }
 
 #[derive(Debug, Serialize, Deserialize)]
-enum WasmNumberLines {
+pub(crate) enum WasmNumberLines {
     #[serde(rename = "new")]
     New(LineNumber),
     #[serde(rename = "continued")]
@@ -52,9 +52,9 @@ enum WasmNumberLines {
 #[derive(Debug, Serialize, Deserialize)]
 #[serde(rename = "number-lines")]
 #[serde(tag = "number-lines")]
-struct WasmNumberLinesWrapper {
+pub(crate) struct WasmNumberLinesWrapper {
     #[serde(flatten)]
-    inner: WasmNumberLines,
+    pub(crate) inner: WasmNumberLines,
 }
 
 to_wasm!(