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## org.optaplanner.core.api.domain.valuerange
Annotation Type ValueRangeProvider

    @Target(value=METHOD)
    @Retention(value=RUNTIME)
    public @interface ValueRangeProvider

Provides the planning values that can be used for a planning variable. This is specified on a getter of a java bean property which returns a `Collection` or `ValueRange`.

A `Collection` is implicitly converted to a `ValueRange`.

Required Element Summary
`String` | `id` Used by `PlanningVariable.valueRangeProviderRefs()` to map a `PlanningVariable` to a `ValueRangeProvider`.

Element Detail

### id

    public abstract String id

  Used by `PlanningVariable.valueRangeProviderRefs()` to map a `PlanningVariable` to a `ValueRangeProvider`.

  Returns:
    never null, must be unique across a `SolverFactory`

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