A user sees "project", "link", and "summary" but behind the scenes, the user is usually setting a subfield. how can a developer determine which subfield is being changed.
For example:
when linking two issues, a user is setting the issuelinks-in/outwardIssue-key sub-field
when selecting a project the user is setting the project-name sub-field
when typing in the summary, the user is setting the summary field