This function provides a secured way to save abundance_dataframe
dataframe.
The more generic functionprovided by TAD save_depending_on_format expects
saves object using their name, but saves nothing if the provided name is not
correct, or mya even save an unwanted object.
This function provides a way to verify the object you want to save, and so,
it is more secured.
save_abundance_dataframe(path, object = NULL)NULL - called for side effects
the path of the file to load
the object to save