Some API pages are not found

And just to add some more info... some APIs seem to be outdated or something. For instance I have this code to get all the interfaces in a project and log the name:

// Get all interfaces in the project
def interfaces = testRunner.getTestCase().getTestSuite().getProject().getInterfaces()

interfaces.each() {
	log.info it.getName()
}

This doesn't work for me and I get some error saying that there is no signature for the getName() method. However the documentation link here says otherwise.