MAdaptive class

A dynamic binding that resolves from a key-value store. Two subtrees, one per platform — the escape hatch for what genuinely cannot be expressed once.

Chosen at generation time, not at render: each generator emits only its own branch, so nothing platform-specific reaches the other side. There is no Dart on the home screen, so a runtime check is not possible.

Reach for this last. Prefer, in order: the per-node platform fields (sfSymbol / androidDrawable), MosaicDefinition(compactRoot:) for size, then this. Every use erodes the single-tree promise the package exists for.

It earns its place where a node behaves differently by platform and the DSL says so: MFlipper renders only its first child on iOS, MActivityIndicator animates only on Android, and MFlexible ratios hold only on Android.

MAdaptive(
  ios: MText('Swipe for more'),        // no self-cycling on iOS
  android: MFlipper([a, b]),
)