Compose Material3: TypographyKt.Typography(...) builder missing from binding (TextStyle inline-class mangling, related to java-interop#1440) #1453

Background

In Xamarin.AndroidX.Compose.Material3Android (verified against
1.4.0.3), the TypographyKt companion class only exposes the
LocalTypography CompositionLocal accessor — the public
Typography(displayLarge, displayMedium, …, labelSmall) builder
function is missing entirely:

// AndroidX.Compose.Material3.TypographyKt (full method list)
get_class_ref()                       -> IntPtr
get_JniPeerMembers()                  -> JniPeerMembers
get_ThresholdClass()                  -> IntPtr
get_ThresholdType()                   -> Type
get_LocalTypography()                 -> ProvidableCompositionLocal
.ctor(IntPtr, JniHandleOwnership)     -> Void
.cctor()                              -> Void
// ^ no Typography(...) builder

Upstream Kotlin (androidx.compose.material3.TypographyKt):

fun Typography(
    displayLarge:    TextStyle = TypographyTokens.DisplayLarge,
    displayMedium:   TextStyle = TypographyTokens.DisplayMedium,
    displaySmall:    TextStyle = TypographyTokens.DisplaySmall,
    headlineLarge:   TextStyle = TypographyTokens.HeadlineLarge,
    ...
    labelSmall:      TextStyle = TypographyTokens.LabelSmall,
): Typography

Every parameter is androidx.compose.ui.text.TextStyle, which is
itself a regular class but has constructors and copy(...) overloads
saturated with @JvmInline value class fields (Color, TextUnit,
FontWeight, FontStyle, BaselineShift, TextGeometricTransform,
…). That triggers the same JVM-mangling story documented in
dotnet/java-interop#1440 — the public Typography factory
in the bytecode is something like Typography-…, and the current
metadata pipeline strips it.

The same package does expose:

• MaterialThemeKt.MaterialTheme(ColorScheme, Shapes, Typography, …)
• MaterialTheme.GetTypography(IComposer, Int32) companion accessor
• new Typography() parameterless ctor

— so the type Typography is fully bound and consumable; only the
factory function that lets you build a customized Typography
with the standard defaults is missing. This blocks
jonathanpeppers/compose-net#61 (parameterizing
MaterialTheme).

Ask

Two paths, listed in order of preference:

1. Long-term: once dotnet/java-interop#1440 lands and
   @JvmInline value class mangling is unwound at bind time, the
   Typography(...) builder should reappear automatically. Track
   this issue against that PR.

2. Short-term workaround (if waiting on Un-strip ui-text-android and ui-unit-android Compose bindings #1440 is not viable):
   add an explicit managedName rename in
   material3-android/Transforms/Metadata.xml that aliases the
   bytecode-mangled Typography-… static method back to a stable
   managed name (TypographyKt.Typography), the same pattern used
   for Text--4IGK_g → Text / Button-bWB7cM8 → Button in
   downstream metadata fixes.

Verification

After the fix, this should compile (in either form):

using AndroidX.Compose.Material3;
using AndroidX.Compose.UI.Text;

Typography typography = TypographyKt.Typography(
    displayLarge: new TextStyle(fontSize: /* Sp */, fontWeight: /* … */),
    /* … */);

Related

• #1438 —
  un-strip ui-graphics-android (precedent for the recipe)
• #1439 —
  un-strip ui-text-android / ui-unit-android (precedent)
• dotnet/java-interop#1440 — root cause of inline-class
  method-name mangling