"operationId": "read_items_items__get",
                "responses": {
                    "200": {
                        "description": "Successful Response",
                        "content": {
                            "application/json": {
                                "schema": {}
                            }
                        }
                    }
                },

### Async Context Manager

If you check, the function is decorated with an `@asynccontextmanager`.

That converts the function into something called an "**async context manager**".

{* ../../docs_src/events/tutorial003.py hl[1,13] *}

A **context manager** in Python is something that you can use in a `with` statement, for example, `open()` can be used as a context manager:

```Python

                    type.length() > 1 && type.length() < 6 ) {
                resp.setContentType( mimeMap.getMimeType( type ));
            }
            resp.setHeader( "Content-Length", file.length() + "" );
            resp.setHeader( "Accept-Ranges", "Bytes" );

            while(( n = in.read( buf )) != -1 ) {
                out.write( buf, 0, n );
            }
        }

import org.opensearch.cluster.metadata.MappingMetadata;
import org.opensearch.common.unit.TimeValue;
import org.opensearch.common.xcontent.XContentType;
import org.opensearch.core.rest.RestStatus;
import org.opensearch.core.xcontent.XContentBuilder;
import org.opensearch.index.IndexNotFoundException;
import org.opensearch.index.query.BoolQueryBuilder;
import org.opensearch.index.query.QueryBuilder;

            assertTrue(value >= from);
            assertTrue(value <= to);
        }
    }

    @Test
    public void searchTestWithBoost() throws Exception {
        String field = "content";
        String query1 = "java";
        String query2 = "sample";
        Map<String, String> params = new HashMap<>();
        params.put("q", field + ":" + query1 + "^1000 OR " + field + ":" + query2);

```Python
with open("./somefile.txt") as f:
    contents = f.read()
    print(contents)
```

Underneath, the `open("./somefile.txt")` creates an object that is called a "Context Manager".

When the `with` block finishes, it makes sure to close the file, even if there were exceptions.

When you create a dependency with `yield`, **FastAPI** will internally create a context manager for it, and combine it with some other related tools.

import org.lastaflute.di.exception.IORuntimeException;
import org.opensearch.action.admin.cluster.health.ClusterHealthResponse;
import org.opensearch.cluster.health.ClusterHealthStatus;
import org.opensearch.common.xcontent.XContentType;

public class PingResponse {
    private static final String CLUSTER_NAME = "cluster_name";
    private static final String STATUS = "status";
    private static final String TIMED_OUT = "timed_out";

    public Builder<N> putEdge(EndpointPair<N> endpoints) {
      mutableGraph.putEdge(endpoints);
      return this;
    }

    /**
     * Returns a newly-created {@code ImmutableGraph} based on the contents of this {@code Builder}.
     */
    public ImmutableGraph<N> build() {
      return ImmutableGraph.copyOf(mutableGraph);
    }
  }

import jcifs.SmbResource;
import jcifs.SmbWatchHandle;
import jcifs.smb.SmbFile;


/**
 * 
 * 
 * Compatability notes:
 * - windows 2k12 will not trigger with FILE_NOTIFY_CHANGE_ATTRIBUTES if the file contents are modified (modtime
 * changes)
 * 
 * @author mbechler
 *
 */
@RunWith ( Parameterized.class )
@SuppressWarnings ( "javadoc" )
public class WatchTest extends BaseCIFSTest {

        fail(
            "contents were not equal and in the same order: "
                + "expected = "
                + expected
                + ", actual = "
                + actual);
      }
    }

    if (expectedIter.hasNext() || actualIter.hasNext()) {
      // actual either had too few or too many elements
      fail(
          "contents were not equal and in the same order: "