Is there a way to define if a field is Ever Updateable, if Update access can be granted to a field by Profile or Permission Set?
Field Describe information for a field can define if permissions can be set to a field by looking into
isPermissionable() function result, but it doesn't say if a field can be set Update permission.
Field Describe information for a field can define if field can by updated by the current user, but also it doesn't say if a field can be set
Update permission by admin for the current user.
Is there a way to determine that some fields like Contract.EndDate or Individual.MasterRecordId is readonly and can never be set