@Override
    public void handle(final MetaData metaData) {
        super.getWasmExtern(HANDLE_METHOD_NAME)
                .map(handle -> callWASI(metaData, handle))
                .orElseThrow(() -> new ShenyuWasmInitException(HANDLE_METHOD_NAME + " function not find in wasm file: " + getWasmName()));
    }
The type abstract wasm metadata subscriber.
shenyu-plugin/shenyu-plugin-wasm-base/src/main/java/org/apache/shenyu/plugin/wasm/base/handler/AbstractWasmMetaDataHandler.java