ThemeSet

```
public final class ThemeSet<T extends Object>

                    
```
SPEC-205 / SPEC-070-A D.1: Theme variants for light / dark mode.
Generic wrapper that allows ANY theme-shaped data class to be specified either as a flat object (legacy — treated as light) or as a light/dark pair. The light variant is the complete baseline and is required; dark is optional sparse overrides that merge on top of light at render time — any field not set in dark falls back to the light value (mirrors iOS asset catalogs' "Dark Appearance" pattern).
Resolution happens at render time via Compose's androidx.compose.foundation.isSystemInDarkTheme() so the SDK auto-adapts when the user toggles system dark mode.
Back-compat: legacy messages / surveys that stored a flat theme object are decoded into light with dark = null. No migration needed on existing customer data.
Mirrors iOS Core/ThemeSet.swift.

Field Summary

Fields
Modifier and Type	Field	Description
`private final T`	`light`
`private final T`	`dark`

Constructor Summary

Constructors
Constructor	Description
`ThemeSet(T light, T dark)`

Method Summary

Modifier and Type	Method	Description
`final T`	`getLight()`
`final T`	`getDark()`
`final T`	`variant(Boolean isDark)`	Pick the variant to render with.
`final T`	`resolve(Boolean isDark)`	Render-time resolver.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ThemeSet
```
ThemeSet(T light, T dark)
```
- Method Detail
  - getLight
```
 final T getLight()
```
  - getDark
```
 final T getDark()
```
  - variant
```
 final T variant(Boolean isDark)
```
    Pick the variant to render with. Does NOT merge — callers that want sparse overrides (the default behavior for themes with optional fields) should call resolve instead which delegates to SparseMergeable.mergedOnto.
    Mirrors iOS ThemeSet.variant(for:).
  - resolve
```
 final T resolve(Boolean isDark)
```
    Render-time resolver. In dark mode, when T implements SparseMergeable, any field set on dark overrides the matching field on light; everything else falls back to the light value. In light mode or when no dark overrides exist, returns light unchanged.
    For non-SparseMergeable types this returns variant which picks dark wholesale or light. Most callers should make their theme types implement SparseMergeable.
    Mirrors iOS ThemeSet.resolved(for:).