mojo/public/tools/mojom/version_compatibility_unittest.py
def testNewStructFieldUnversioned(self):
    """Adding a new field to a struct without a new (i.e. higher than any
    existing version) [MinVersion] tag breaks backward-compatibility."""
    self.assertNotBackwardCompatible('struct S { string a; };',
                                     'struct S { string a; string b; };')
Adding a new field to a struct without a new (i.e. higher than any
    existing version) [MinVersion] tag breaks backward-compatibility.
Adding a new field to a struct without a new  [MinVersion] tag breaks backward-compatibility.
Adding a new field to a struct without a new [ MinVersion ] tag breaks backward - compatibility .
def testNewStructFieldUnversioned(self):
    self.assertNotBackwardCompatible('struct S { string a; };',
                                     'struct S { string a; string b; };')
def testNewStructFieldUnversioned ( self ) : self . assertNotBackwardCompatible ( 'struct S { string a; };' , 'struct S { string a; string b; };' )
Adding a new field to a struct without a new (i.e.
Adding a new field to a struct without a new ( i . e .
"""Adding a new field to a struct without a new (i.e. higher than any
    existing version) [MinVersion] tag breaks backward-compatibility."""
self