DynamicId (Spectator)

```
public interface DynamicId
```
An extension of the Id interface that allows the list of tag names attached to the Id to be declared in advance of the use of the metric. This can be used to provide a default value for a tag or to use a TagFactory implementation that uses context available in the execution environment to compute the value of the tag.

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`String`	`name()` Description of the measurement that is being collected.
`Id`	`resolveToId()` Invokes each of the associated tag factories to produce a Id based on the runtime context available when this method is invoked.
`Iterable<Tag>`	`tags()` Other dimensions that can be used to classify the measurement.
`DynamicId`	`withTag(String k, String v)` New id with an additional tag value.
`DynamicId`	`withTag(Tag t)` New id with an additional tag value.
`DynamicId`	`withTagFactories(Iterable<TagFactory> factories)` New id with additional tag factories.
`DynamicId`	`withTagFactory(TagFactory factory)` New id with an additional tag factory.
`DynamicId`	`withTags(Iterable<Tag> tags)` New id with additional tag values.
`DynamicId`	`withTags(Map<String,String> tags)` New id with additional tag values.

Interface DynamicId