Function0 (Apache Calcite API)

Type Parameters:

R - Result type

All Superinterfaces:

Function<R>

All Known Implementing Classes:

Functions.Ignore
```
public interface Function0<R>
extends Function<R>
```
Function with no parameters.

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  R apply()

- Method Detail
  - apply
```
R apply()
```