FeatureRenderer deprecation warning

[jorgegil]

2017-06-30T17:12:41 1 warning:
/.qgis2/python/plugins/esstoolkit/explorer/AttributeSymbology.py:111:
DeprecationWarning: QgsFeatureRendererV2.symbols() is deprecated for symbol in renderer.symbols():
traceback: File "/Users/jorge/.qgis2/python/plugins/esstoolkit/explorer/ExplorerDialog.py", line 147, in __selectCurrentLayer
self.layerChanged.emit()
File "/Users/jorge/.qgis2/python/plugins/esstoolkit/explorer/ExplorerTool.py", line 246, in updateLayerAttributes
self.dlg.setCurrentAttribute(current_attribute)
File "/Users/jorge/.qgis2/python/plugins/esstoolkit/explorer/ExplorerDialog.py", line 179, in setCurrentAttribute
self.attributesList.setCurrentRow(idx)
File "/Users/jorge/.qgis2/python/plugins/esstoolkit/explorer/ExplorerTool.py", line 349, in updateSymbology
renderer = self.attributeSymbology.updateRenderer(self.current_layer, attribute, settings)