fnCheckAndUpdateItemProperty = function(oItem, oPropertyInfoProValue, sPropertyName, sDefaultValue) {
					const value = oItem.getProperty(sPropertyName);
					if (!value || value !== oPropertyInfoProValue) {
						if (value !== oPropertyInfoProValue) {
							Log.error("sap.ui.mdc.Chart", `the propertyInfo.${sPropertyName} for Item '${oItem.getId()}' has a different value! new value = ${ oPropertyInfoProValue || sDefaultValue }`);
						}
						oItem.setProperty(sPropertyName, oPropertyInfoProValue || sDefaultValue);
					}
				}
This iterates over all items of the chart to make sure all necessary information is available on them.
If something is missing, this method updates the item accordingly. This is the last check before the inner chart is rendered.
@returns {Promise} Resolves once check is complete

@private