Transformer (Cucumber Expressions 15.0.1 API)

Type Parameters:

T - the type to transform to.

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
public interface Transformer<T>
```
Transformer for a @ParameterType with zero or one capture groups.

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  T transform(String arg)
  Transforms a string into to an object.

- Method Detail
  - transform
```
T transform(String arg)
     throws Throwable
```
    Transforms a string into to an object. The string is either taken from the sole capture group or matches the whole expression. Nested capture groups are ignored.
    If the capture group is optional arg may be null.
    
    Parameters:
    
    arg - the value of the single capture group
    
    Returns:
    
    the transformed object
    
    Throws:
    
    Throwable - if transformation failed