mojo/public/tools/mojom/version_compatibility_unittest.py
def testStructFieldTypeChange(self):
    """Changing the type of an existing field always breaks
    backward-compatibility."""
    self.assertNotBackwardCompatible('struct S { string a; };',
                                     'struct S { array<int32> a; };')
Changing the type of an existing field always breaks
    backward-compatibility.
Changing the type of an existing field always breaks
backward-compatibility.
Changing the type of an existing field always breaks backward - compatibility .
def testStructFieldTypeChange(self):
    self.assertNotBackwardCompatible('struct S { string a; };',
                                     'struct S { array<int32> a; };')
def testStructFieldTypeChange ( self ) : self . assertNotBackwardCompatible ( 'struct S { string a; };' , 'struct S { array<int32> a; };' )
Changing the type of an existing field always breaks
backward-compatibility.
Changing the type of an existing field always breaks backward - compatibility .
"""Changing the type of an existing field always breaks
    backward-compatibility."""
self