private void consumeNumber(TensorAddress address) {
            consumeNumber(builder.type().valueType(),
                          f -> builder.cell(address, f),
                          d -> builder.cell(address, d));
        }
Parses mixed tensor short form {0:17.0, 1:42.0, ...} used for single unbound dimension
vespajlib/src/main/java/com/yahoo/tensor/TensorParser.java