WhenCallback (Tapestry API - 5.9.0)

```
public interface WhenCallback
```
Used with InstructionBuilder.when(Condition, WhenCallback).

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`ifFalse(InstructionBuilder builder)`	Generates code for when the condition is false.
`void`	`ifTrue(InstructionBuilder builder)`	Generates code for when the condition is true.

- Method Detail
  - ifTrue
```
void ifTrue(InstructionBuilder builder)
```
    Generates code for when the condition is true.
  - ifFalse
```
void ifFalse(InstructionBuilder builder)
```
    Generates code for when the condition is false.