getReadDelegateForControl(mPropertyBag) {
			return DelegateMediator.getReadDelegateForControl(
				mPropertyBag.control,
				mPropertyBag.modifier,
				mPropertyBag.modelType,
				mPropertyBag.supportsDefault
			);
		}
Returns the model-specific read delegate for the requested control.
The instance-specific read delegate is returned if available.

@param {object} mPropertyBag - Property bag
@param {sap.ui.core.Element|Element} mPropertyBag.control - Control for which the corresponding delegate should be returned
@param {sap.ui.core.util.reflection.BaseTreeModifier} mPropertyBag.modifier - Control tree modifier
@param {string} [mPropertyBag.modelType] - Model type; required in case you passed the <code>XmlTreeModifier</code>
@returns {Promise.<sap.ui.core.util.reflection.FlexDelegateInfo>} Delegate information including the lazy loaded instance of the delegate

@private
@ui5-restricted sap.ui.fl, sap.ui.rta, smart controls