public Builder setUrl(java.lang.String value) {
                if (value == null) {
                    throw new NullPointerException();
                }
                url_ = value;
                bitField0_ |= 0x00000001;
                onChanged();
                return this;
            }
<code>string url = 1;</code>

@param value The url to set.
@return This builder for chaining.
turms-server-common/src/main/java/im/turms/server/common/access/client/dto/model/file/File.java