The JavaFX 8 Gridpane method setConstraints(...) is not recognised by Intellij

While creating a JavaFX 8 application, when I try to set component constraints on a node in a GridPane using the setConstraints() method, Intellij registers an error indicating that it does not recognise the setConstraints() method as being associated with the GridPane object.

The problem is happening with Intellij IDEA 2016 and Intellij IDEA 2017.2.6.