public Builder setExpirationDate(long value) {

            expirationDate_ = value;
            bitField0_ |= 0x00000020;
            onChanged();
            return this;
        }
<code>optional int64 expiration_date = 6;</code>

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