public Test3 TwoParameterTest(Test1 test1, Test2 test2) => null;
public Test2 Test1_To_Test2_null_return(Test1 test) => null;
public Test3 TwoParameterTest(Test1 test1, Test2 test2) => null;
public Test2 Test1_To_Test2_null_return(Test1 test) => null;