SubcircuitRegister (CircuitSim Autograder API)

```
@Retention(RUNTIME)
public @interface SubcircuitRegister
```
Instructs CircuitSimExtension to find and inject a MockRegister for a Register component into a MockRegister field in a test class.
When you annotate a MockRegister field in a test class with this, CircuitSimExtension will use Subcircuit.mockOnlyRegister(int) to replace the only register in the file with a "ghost register." See MockRegister for details.

See Also:

MockRegister, Subcircuit.mockOnlyRegister(int)

- Required Element Summary
  
  Required Elements
  Modifier and Type Required Element Description
  
  int bits
  Desired bitsize of a matching register.
- Optional Element Summary
  
  Optional Elements
  Modifier and Type Optional Element Description
  
  boolean onlyRegister
  Whether to match the only register in the subcircuit.

- Element Detail
  - bits
```
int bits
```
    Desired bitsize of a matching register.
    
    Returns:
    
    bitsize of a matching register
- - onlyRegister
```
boolean onlyRegister
```
    Whether to match the only register in the subcircuit.
    
    Returns:
    
    true if you want the only register in the file, false otherwise (default but currently not supported).
    
    Default:
    
    false