Builder.ObtainVia (Lombok)

```
@Target({FIELD,PARAMETER})
@Retention(SOURCE)
public static @interface Builder.ObtainVia
```
Put on a field (in case of @Builder on a type) or a parameter (for @Builder on a constructor or static method) to indicate how lombok should obtain a value for this field or parameter given an instance; this is only relevant if toBuilder is true. You do not need to supply an @ObtainVia annotation unless you wish to change the default behaviour: Use a field with the same name.
Note that one of field or method should be set, or an error is generated.
The default behaviour is to obtain a value by referencing the name of the parameter as a field on 'this'.

- Optional Element Summary
  
  Optional Elements
  Modifier and Type Optional Element Description
  
  java.lang.String field
  
  boolean isStatic
  
  java.lang.String method

- Element Detail
  - field
```
java.lang.String field
```
    Returns:
    
    Tells lombok to obtain a value with the expression this.value.
    
    Default:
    
    ""
- - method
```
java.lang.String method
```
    Returns:
    
    Tells lombok to obtain a value with the expression this.method().
    
    Default:
    
    ""
- - isStatic
```
boolean isStatic
```
    Returns:
    
    Tells lombok to obtain a value with the expression SelfType.method(this); requires method to be set.
    
    Default:
    
    false