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My instances represent ranges of objects, typically Number type objects. I provide iteration/enumeration messages for producing all the members that my instance represents.
| • Interval class-instance creation: | (class) | |
| • Interval-basic: | (instance) | |
| • Interval-printing: | (instance) | |
| • Interval-storing: | (instance) | |
| • Interval-testing: | (instance) |