'Try to return the list of all appropriate tool data sample files included
in the repository.'

def get_tool_index_sample_files(self, sample_files):

    tool_index_sample_files = []
    for s in sample_files:
        if (s.endswith('.loc.sample') or s.endswith('.xml.sample') or s.endswith('.txt.sample')):
            tool_index_sample_files.append(str(s))
    return tool_index_sample_files
