//@moduleElements.0/@body/@statements.0/@variables.0/@initExpression/@aql/@arguments.0/@arguments.0
Add parameter notExisting
Replace file:/home/development/git/acceleo/tests/org.eclipse.acceleo.aql.tests/resources/language/letStatement/invalidExpression/invalidExpression.mtl [125, 2, 53, 125, 2, 53] , notExisting: String
Surround with Let: notExisting
Replace file:/home/development/git/acceleo/tests/org.eclipse.acceleo.aql.tests/resources/language/letStatement/invalidExpression/invalidExpression.mtl [131, 3, 2, 237, 5, 8] [let notExisting : String = '']
    [let myVariable : ecore::EClassifier = notExisting.eClassifiers->first()]
      some static text.
    [/let]
  [/let]