I have created a custom field in Highrise that is updated at a user's
In order to do that update, I need the subject-field id
What I could do is call GET /custom-fields.xml, then look inside the
returned xml to find the right tag and get the id from the same
<subject-field>. But that's slow and complicated.
What I'd prefer to do is store the subject-field-id as an environment
variable. But I need to know if these id's are more or less "permanent", or
are subject to frequent change which would render my calls useless.