ExternalTransformRegistrar (core 2.44.0 API)

All Known Implementing Classes:

GenerateSequence.External
```
@Experimental(PORTABILITY)
public interface ExternalTransformRegistrar
```
A registrar which contains a mapping from URNs to available ExternalTransformBuilders. Should be used with AutoService.

Method Summary

All Methods Instance Methods Default Methods Deprecated Methods
Modifier and Type	Method	Description
`default java.util.Map<java.lang.String,ExternalTransformBuilder<?,?,?>>`	`knownBuilderInstances()`	A mapping from URN to an `ExternalTransformBuilder` instance.
`default java.util.Map<java.lang.String,java.lang.Class<? extends ExternalTransformBuilder<?,?,?>>>`	`knownBuilders()`	Deprecated. Prefer implementing 'knownBuilderInstances'.

- Method Detail
  - knownBuilders
```
@Deprecated
default java.util.Map<java.lang.String,java.lang.Class<? extends ExternalTransformBuilder<?,?,?>>> knownBuilders()
```
    Deprecated.
    Prefer implementing 'knownBuilderInstances'. This method will be removed in a future version of Beam.
    
    A mapping from URN to an ExternalTransformBuilder class.
  - knownBuilderInstances
```
default java.util.Map<java.lang.String,ExternalTransformBuilder<?,?,?>> knownBuilderInstances()
```
    A mapping from URN to an ExternalTransformBuilder instance.