fun statementStartsAndStops() {
    val called = AtomicBoolean()
    val statement =
      server.apply(
        object : Statement() {
          override fun evaluate() {
            called.set(true)
            server.url("/").toUrl().openConnection().connect()
          }
        },
        Description.EMPTY,
      )
    statement.evaluate()
    assertThat(called.get()).isTrue()
    try {

Only the code prior to and including the `yield` statement is executed before creating a response:

```Python hl_lines="2-4"
{!../../../docs_src/dependencies/tutorial007.py!}
```

The yielded value is what is injected into *path operations* and other dependencies:

```Python hl_lines="4"
{!../../../docs_src/dependencies/tutorial007.py!}
```

The code following the `yield` statement is executed after the response has been delivered:

     * climbing up the syntax tree, passing control back and forth between the
     * two.
     *
     * Whether an expression is used is defined by the context in which it
     * appears. E.g. a "statement" in a block is considered used if it is the
     * last expression in that block AND the block itself is used -- a
     * recursive call to `isUsed`, one level higher in the syntax tree.
     *

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