Contains a list of child entities, either OUs or accounts.
The unique identifier (ID) of this child entity.
The regex pattern for a child ID string requires one of the following:
Account - A string that consists of exactly 12 digits.
Organizational unit (OU) - A string that begins with "ou-" followed by from 4 to 32 lowercase letters or digits (the ID of the root that contains the OU). This string is followed by a second "-" dash and from 8 to 32 additional lowercase letters or digits.
The type of this child entity.