public Object transform( int to, Object input, Map<String, Object> context ) {
        return transform( 0, to, input, context );
    }
public Object transform ( int to , Object input , Map < String , Object > context ) { return transform ( 0 , to , input , context ) ; }
Useful for testing and debugging.

@param input the input data to transform
@param to transform from the chainrSpec to end with: 0 based index exclusive
@param context optional tweaks that the consumer of the transform would like