Cannot override get_FOO_display() in Django 2.2+.

Description

I cannot override the get_FIELD_display function on models since version 2.2. It works in version 2.1.
Example:
class FooBar(models.Model):
foo_bar = models.CharField(_("foo"), choices=[(1, 'foo'), (2, 'bar')])
def __str__(self):
return self.get_foo_bar_display() # This returns 'foo' or 'bar' in 2.2, but 'something' in 2.1
def get_foo_bar_display(self):
return "something"
What I expect is that I should be able to override this function.