Currently s/s/m/j/o/s/m/w/MockPart.java from 5.x to 4.3.x is 5.x only
In 4.3.x there is MockHttpServletRequest.java#addPart(Part p), but no mock for Part
It'd be useful to be able to reuse MockPart in 4.3.x
Context : wrote a test case in a non Spring Web project (bare Servlets + Mockito) but used Spring Test mocks in test dependencies. Had to copy paste MockPart from 5.x without Nullable/Assert to get the mock.