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Exit.\n    return;\n  }\n\n  request.headers.set(\"Content-Type\", contentType ?? \"multipart/form-data\");\n\n  // set body to MultipartRequestBody using content from FormDataMap\n  const parts: BodyPart[] = [];\n\n  for (const [fieldName, values] of Object.entries(formData)) {\n    for (const value of Array.isArray(values) ? values : [values]) {\n      if (typeof value === \"string\") {\n        parts.push({\n          headers: createHttpHeaders({\n            \"Content-Disposition\": `form-data; name=\"${fieldName}\"`,\n          }),\n          body: stringToUint8Array(value, \"utf-8\"),\n        });\n      } else if (value === undefined || value === null || typeof value !== \"object\") {\n        throw new Error(\n          `Unexpected value for key ${fieldName}: ${value}. Value should be serialized to string first.`,\n        );\n      } else {\n        // using || instead of ?? here since if value.name is empty we should create a file name\n        const fileName = (value as File).name || \"blob\";\n        const headers = createHttpHeaders();\n        headers.set(\n          \"Content-Disposition\",\n          `form-data; name=\"${fieldName}\"; filename=\"${fileName}\"`,\n        );\n\n        // again, || is used since an empty value.type means the content type is unset\n        headers.set(\"Content-Type\", value.type || \"application/octet-stream\");\n\n        parts.push({\n          headers,\n          body: value,\n        });\n      }\n    }\n  }\n  request.multipartBody = { parts };\n}\n"]}