def get_multifile_object_child_location(self, parent_location: str, child_name: str):
check_var(parent_location, var_types=str, var_name='<STR_LIT>')<EOL>check_var(child_name, var_types=str, var_name='<STR_LIT>')<EOL>return parent_location + self.separator + child_name<EOL>
Implementation of the parent abstract method.

In this mode the attribute is a file with the same prefix, separated from the parent object name by
the character sequence <self.separator>

:param parent_location: the absolute file prefix of the parent item.
:param child_name:
:return: the file prefix for this attribute