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For every family member, read users and groups that have either view or edit edit access on the patient, then
gives the sam elevel of access on the family for those users and groups. After performing this method, if p is a
member of the family, and x has level y access on p, x has level y access on the family. The user who is the
owner of the family always has full access to the family. access on p, x has edit access of the family. The famly
document is saved to disk after permissions are updated.