@hep.over('<STR_LIT>', '<STR_LIT>')<EOL>@utils.flatten<EOL>@utils.for_each_value<EOL>def abstracts(self, key, value):
result = []<EOL>source = force_single_element(value.get('<STR_LIT>'))<EOL>for a_value in force_list(value.get('<STR_LIT:a>')):<EOL><INDENT>result.append({<EOL>'<STR_LIT:source>': source,<EOL>'<STR_LIT:value>': a_value,<EOL>})<EOL><DEDENT>return result<EOL>
Populate the ``abstracts`` key.