| Interface | Description | 
|---|---|
| Problem | Describes a problem that was encountered during settings building. | 
| ProblemCollector | Collects problems that are encountered during settings building. | 
| Source | Provides access to the contents of a source independently of the backing store (e.g. | 
| Class | Description | 
|---|---|
| FileSource | Wraps an ordinary  Fileas a source. | 
| ProblemCollectorFactory | |
| StringSource | Wraps an ordinary  CharSequenceas a source. | 
| UrlSource | Wraps an ordinary  URLas a source. | 
| Enum | Description | 
|---|---|
| Problem.Severity | The different severity levels for a problem, in decreasing order. | 
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