MetalsWeight
- iqType: string | null
_level required - kgType: number | nullrequired
- numericType: number | null
_score required - retrievedType: string | nullFormat: date-time
_at requiredthe date-time notation as defined by RFC 3339, section 5.6, for example, 2017-07-21T17:32:28Z
- sourceType: string | nullrequired