whenOrNull<TResult extends Object?> method Null safety

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. int value
    )?,
  2. {TResult? fromARGB(
    1. int a,
    2. int r,
    3. int g,
    4. int b
    )?,
  3. TResult? fromRGBO(
    1. int r,
    2. int g,
    3. int b,
    4. double opacity
    )?,
  4. TResult? alphaBlend(
    1. Color foreground,
    2. Color background
    )?,
  5. TResult? material(
    1. int value,
    2. Map<int, Color> swatch
    )?,
  6. TResult? materialAccentColor(
    1. int value,
    2. Map<int, Color> swatch
    )?,
  7. TResult? primary(
      )?,
    1. TResult? onPrimary(
        )?,
      1. TResult? primaryContainer(
          )?,
        1. TResult? onPrimaryContainer(
            )?,
          1. TResult? secondary(
              )?,
            1. TResult? onSecondary(
                )?,
              1. TResult? secondaryContainer(
                  )?,
                1. TResult? onSecondaryContainer(
                    )?,
                  1. TResult? tertiary(
                      )?,
                    1. TResult? onTertiary(
                        )?,
                      1. TResult? tertiaryContainer(
                          )?,
                        1. TResult? onTertiaryContainer(
                            )?,
                          1. TResult? error(
                              )?,
                            1. TResult? onError(
                                )?,
                              1. TResult? errorContainer(
                                  )?,
                                1. TResult? onErrorContainer(
                                    )?,
                                  1. TResult? outline(
                                      )?,
                                    1. TResult? outlineVariant(
                                        )?,
                                      1. TResult? background(
                                          )?,
                                        1. TResult? onBackground(
                                            )?,
                                          1. TResult? surface(
                                              )?,
                                            1. TResult? onSurface(
                                                )?,
                                              1. TResult? surfaceVariant(
                                                  )?,
                                                1. TResult? onSurfaceVariant(
                                                    )?,
                                                  1. TResult? inverseSurface(
                                                      )?,
                                                    1. TResult? onInverseSurface(
                                                        )?,
                                                      1. TResult? inversePrimary(
                                                          )?,
                                                        1. TResult? shadow(
                                                            )?,
                                                          1. TResult? scrim(
                                                              )?,
                                                            1. TResult? surfaceTint(
                                                                )?}
                                                              )
                                                              @optionalTypeArgs, inherited

                                                              Implementation

                                                              @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  TResult? Function(int value)? $default, {
  TResult? Function(int a, int r, int g, int b)? fromARGB,
  TResult? Function(int r, int g, int b, double opacity)? fromRGBO,
  TResult? Function(Color foreground, Color background)? alphaBlend,
  TResult? Function(int value, Map<int, Color> swatch)? material,
  TResult? Function(int value, Map<int, Color> swatch)? materialAccentColor,
  TResult? Function()? primary,
  TResult? Function()? onPrimary,
  TResult? Function()? primaryContainer,
  TResult? Function()? onPrimaryContainer,
  TResult? Function()? secondary,
  TResult? Function()? onSecondary,
  TResult? Function()? secondaryContainer,
  TResult? Function()? onSecondaryContainer,
  TResult? Function()? tertiary,
  TResult? Function()? onTertiary,
  TResult? Function()? tertiaryContainer,
  TResult? Function()? onTertiaryContainer,
  TResult? Function()? error,
  TResult? Function()? onError,
  TResult? Function()? errorContainer,
  TResult? Function()? onErrorContainer,
  TResult? Function()? outline,
  TResult? Function()? outlineVariant,
  TResult? Function()? background,
  TResult? Function()? onBackground,
  TResult? Function()? surface,
  TResult? Function()? onSurface,
  TResult? Function()? surfaceVariant,
  TResult? Function()? onSurfaceVariant,
  TResult? Function()? inverseSurface,
  TResult? Function()? onInverseSurface,
  TResult? Function()? inversePrimary,
  TResult? Function()? shadow,
  TResult? Function()? scrim,
  TResult? Function()? surfaceTint,
}) =>
    throw _privateConstructorUsedError;