doColumn("createdBy");
        }

        public void columnCreatedTime() {
            doColumn("createdTime");
        }

        public void columnGenerator() {
            doColumn("generator");
        }

        public void columnPath() {
            doColumn("path");
        }

        public void columnTarget() {
            doColumn("target");
        }

      // assumes that each set is a singleton or less (as is done for the samples)
      for (Object elem : elements) {
        @SuppressWarnings("unchecked") // safe by generator contract
        Entry<String, Collection<Integer>> entry = (Entry<String, Collection<Integer>>) elem;
        Integer value = getOnlyElement(entry.getValue());
        builder.put(entry.getKey(), value);
      }

      // assumes that each set is a singleton or less (as is done for the samples)
      for (Object elem : elements) {
        @SuppressWarnings("unchecked") // safe by generator contract
        Entry<String, Collection<Integer>> entry = (Entry<String, Collection<Integer>>) elem;
        Integer value = getOnlyElement(entry.getValue());
        builder.put(entry.getKey(), value);
      }

            result.setCreatedBy(DfTypeUtil.toString(source.get("createdBy")));
            result.setCreatedTime(DfTypeUtil.toLong(source.get("createdTime")));
            result.setGenerator(DfTypeUtil.toString(source.get("generator")));
            result.setPath(DfTypeUtil.toString(source.get("path")));
            result.setTarget(DfTypeUtil.toString(source.get("target")));
            result.setThumbnailId(DfTypeUtil.toString(source.get("thumbnail_id")));

这让你可以轻松生成最新的**文档**、多语言的客户端库（<abbr title="Software Development Kits - 软件开发工具包">**SDKs**</abbr>），以及与代码保持同步的**测试**或**自动化工作流**。

本指南将带你为 FastAPI 后端生成一个 **TypeScript SDK**。

## 开源 SDK 生成器 { #open-source-sdk-generators }

一个功能多样的选择是 [OpenAPI Generator](https://openapi-generator.tech/)，它支持**多种编程语言**，可以根据你的 OpenAPI 规范生成 SDK。

对于 **TypeScript 客户端**，[Hey API](https://heyapi.dev/) 是为 TypeScript 生态打造的专用方案，提供优化的使用体验。

import java.io.OutputStream;
import java.lang.reflect.Method;
import java.util.Map.Entry;
import java.util.Random;
import junit.framework.TestSuite;
import org.jspecify.annotations.NullUnmarked;

/**
 * A generator of {@code TestSuite} instances for testing {@code ByteSource} implementations.
 * Generates tests of all methods on a {@code ByteSource} given various inputs the source is

    assertEquals(
        String.format("expected: %08x, actual: %08x", expectedCrc, actualCrc),
        expectedCrc,
        actualCrcHasher);
  }

  // From RFC 3720, Section 12.1, the polynomial generator is 0x11EDC6F41.
  // We calculate the constant below by:
  //   1. Omitting the most significant bit (because it's always 1). => 0x1EDC6F41

import java.io.OutputStream;
import java.lang.reflect.Method;
import java.util.Map.Entry;
import java.util.Random;
import junit.framework.TestSuite;
import org.jspecify.annotations.NullUnmarked;

/**
 * A generator of {@code TestSuite} instances for testing {@code ByteSource} implementations.
 * Generates tests of all methods on a {@code ByteSource} given various inputs the source is

Only so that it can live in the same file for this example and you can copy it and run it as is. 🥚

///

By using a `with` block, we make sure that the file-like object is closed after the generator function (the function with `yield`) is done. So, after it finishes sending the response.

                  CollectionFeature.RESTRICTS_ELEMENTS,
                  ListFeature.SUPPORTS_SET)
              .createTestSuite());
    }
    return suite;
  }

  // Test generators.  To let the GWT test suite generator access them, they need to be
  // public named classes with a public default constructor.

  public static final class FloatsAsListGenerator extends TestFloatListGenerator {
    @Override