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A simple wrapper component that provides a responsive container for icon blocks, acting as a basic passthrough component with optional styling.

## Key Components

- **ResponsiveIconsBlockProps** - Interface defining the component props with optional children and className
- **ResponsiveIconsBlock** - React functional component that renders a div wrapper around child elements

## Usage Example

```typescript
import { ResponsiveIconsBlock } from './responsive-icons-block-stub';

function IconGrid() {
  return (
    <ResponsiveIconsBlock className="grid grid-cols-3 gap-4">
      <div>Icon 1</div>
      <div>Icon 2</div>
      <div>Icon 3</div>
    </ResponsiveIconsBlock>
  );
}

// Simple wrapper usage
function BasicUsage() {
  return (
    <ResponsiveIconsBlock>
      <span>📱</span>
      <span>💻</span>
      <span>🖥️</span>
    </ResponsiveIconsBlock>
  );
}
```

This stub component serves as a minimal implementation that can be extended with responsive behavior, grid layouts, or specific icon styling as needed.