An overview can be constituted-of-or-filled-with (culture and society).
A section may provide an overview of a purpose of a document.
A subsection may present an overview of (traffic engineering).
An overview can be constituted-of-or-filled-with (traffic engineering).
An overview can be constituted-of-or-filled-with some classes.
A document may represent an overview of a number of building blocks.
An overview can be constituted-of-or-filled-with some implementations.