diff --git a/src/H5ChunkedWriter.cpp b/src/H5ChunkedWriter.cpp
index 69d6dbb..a626b86 100644
--- a/src/H5ChunkedWriter.cpp
+++ b/src/H5ChunkedWriter.cpp
@@ -187,6 +187,6 @@ hsize_t HDF5ChunkedWriter::prepare_storage_for_frame(size_t frame_index, size_t*
     return relative_frame_index;
 }
 
-void HDF5ChunkedWriter::write_format(h5_group& format_root, std::map<std::string, h5_value>& values) {
-    h5_utils::write_format_data(file, format_root, values);
+H5::H5File& HDF5ChunkedWriter::get_h5_file() {
+    return file;
 }
\ No newline at end of file
diff --git a/src/H5ChunkedWriter.hpp b/src/H5ChunkedWriter.hpp
index 656e132..9cbe461 100644
--- a/src/H5ChunkedWriter.hpp
+++ b/src/H5ChunkedWriter.hpp
@@ -36,7 +36,7 @@ class HDF5ChunkedWriter
         ~HDF5ChunkedWriter();
         void close_file();
         void write_data(size_t frame_index, size_t* frame_shape, size_t data_bytes_size, char* data);
-        void write_format(h5_group& format_root, std::map<std::string, h5_value>& values);
+        H5::H5File& get_h5_file();
 };
 
 #endif
\ No newline at end of file