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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def toil_get_file(file_store, index, existing, file_store_id):
 """Get path to input file from Toil jobstore."""


    if not file_store_id.startswith("toilfs:"):
        return file_store.jobStore.getPublicUrl(file_store.jobStore.importFile(file_store_id))
    src_path = file_store.readGlobalFile(file_store_id[7:])
    index[src_path] = file_store_id
    existing[file_store_id] = src_path
    return schema_salad.ref_resolver.file_uri(src_path)