WhileCallback (Tapestry API - 5.7.2)

```
public interface WhileCallback
```
Callback used with InstructionBuilder.doWhile(Condition, WhileCallback).

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`buildBody(InstructionBuilder builder)`	Provides the main code executed inside the loop.
`void`	`buildTest(InstructionBuilder builder)`	Creates the code to be evaluated by the `Condition`; often this involves loading a value from a variable or argument, or `InstructionBuilder.dupe()`'ing the top value on the stack.

- Method Detail
  - buildTest
```
void buildTest(InstructionBuilder builder)
```
    Creates the code to be evaluated by the Condition; often this involves loading a value from a variable or argument, or InstructionBuilder.dupe()'ing the top value on the stack.
  - buildBody
```
void buildBody(InstructionBuilder builder)
```
    Provides the main code executed inside the loop.