Summary
Where a question is very long it is often a good idea to provide a summary section that quickly gets to the main points, this allows anyone reading to quickly establish if they are likely to be interested in the rest of the question and provides a core reference for people looking at the question. Of course you should ideally make a question exactly the length to explain everything and nothing more.
Considerations for code and an SSCCE
A pattern that I have seen effectively exploited is one in which the key problematic method is brought out in something like a summary section but an SSCCE is still provided as additional information. As always the SSCCE should be as short as possible but still replicate the problem
Background
This section is to explain that you should include a background section to include anything that may be useful but isn't critical. It's included to provide context as to the answer to the question you asked
Example
As always adding an example can often be useful
Summary
Where a question is very long it is often a good idea to provide a summary section that quickly gets to the main points, this
allows anyone reading to quickly establish if they are likely to be
interested in the rest of the question and provides a core reference
for people looking at the question
Background
This section is to explain that you should include a background section to include anything that may be useful but isn't
critical. It's included to provide context as to the answer to the
question you asked
Example
Adding an example can often be useful: