def __check_left_side_conflict(x, y, dfs_data):
l = dfs_data['<STR_LIT>']['<STR_LIT:l>']<EOL>w, z = dfs_data['<STR_LIT>'][l]<EOL>return __check_conflict_fronds(x, y, w, z, dfs_data)<EOL>
Checks to see if the frond xy will conflict with a frond on the left side of the embedding.