rest-assured/src/main/java/io/restassured/config/HttpClientConfig.java
public HttpClientConfig httpMultipartMode(HttpMultipartMode httpMultipartMode) {
        return new HttpClientConfig(httpClientFactory, httpClientParams, httpMultipartMode, shouldReuseHttpClientInstance, httpClient, true);
    }
public HttpClientConfig httpMultipartMode(HttpMultipartMode httpMultipartMode) {
        return new HttpClientConfig(httpClientFactory, httpClientParams, httpMultipartMode, shouldReuseHttpClientInstance, httpClient, true);
    }
Specify the HTTP Multipart mode when sending multi-part data.

@param httpMultipartMode The multi-part mode to set.
@return An updated HttpClientConfig