_loadModules(sFlexModulesUri) {
			return new Promise(function(resolve, reject) {
				includeScript(sFlexModulesUri, undefined, resolve, reject);
			});
		}
Loads the modules in a CSP-compliant way via the UI5 core scripting mechanism
This function has been extracted from the function <code>loadFlexData</code>
The purpose of this is to have a function that can be stubbed for testing.

@param {string} sFlexModulesUri Uri to load flex modules
@returns {Promise} Returns a Promise resolved empty after the script was included
@private