def edge_width_(self,eidx,use_default=True):
		if eidx not in self._ewidths:
			if use_default:
				return self._default_ewidth
			else:
				return None
		else:
			return self._ewidths[eidx]
Return list of fieldnames to request based on conform, or None.
dataset/ETHPy150Open networkdynamics/zenlib/src/zen/view.py/View.edge_width_--crossover with--dataset/ETHPy150Open openaddresses/machine/openaddr/cache.py/EsriRestDownloadTask.field_names_to_request