}
            printWriter.accept(sb.toString());
        }
    }

    @Override
    public final Options interpolate(UnaryOperator<String> callback) {
        try {
            // now that we have properties, interpolate all arguments
            Interpolator interpolator = createInterpolator();
            CommandLine.Builder commandLineBuilder = CommandLine.builder();

                Interpolation nt = new Interpolation(pa, interpolator::interpolate);
                nt.performFor(pa.getName(), "name", pa::setName);
                nt.performFor(pa.getValue(), "value", pa::setValue);
            });
            a.map(Activation::getJdk).ifPresent(ja -> new Interpolation(activation, interpolator::interpolate)
                    .performFor(ja, "jdk", activation::setJdk));
        }

        assertViolations(result, 0, 0, 2);

        assertEquals(
                "'profiles.profile[exists-project-version].activation.file.exists' "
                        + "Failed to interpolate profile activation property ${project.version}/test.txt: "
                        + "${project.version} expressions are not supported during profile activation.",
                result.getWarnings().get(0));

    @Test
    void interpolate() throws ModelInterpolationException, InitializationException {
        Model model = Model.newBuilder()
                .groupId("group")
                .location("groupId", InputLocation.of(InputSource.of("model", null)))
                .build();
        StringSearchModelInterpolator interpolator = new StringSearchModelInterpolator();
        interpolator.initialize();

    }

    public interface ContentTransformer {
        /**
         * Interpolate the value read from the xpp3 document
         * @param source The source value
         * @param fieldName A description of the field being interpolated. The implementation may use this to
         *                           log stuff.
         * @return The interpolated value.
         */
        String transform(String source, String fieldName);

            return false;
        }

        try {
            path = profileActivationFilePathInterpolator.interpolate(path, context);
        } catch (InterpolationException e) {
            problems.add(new ModelProblemCollectorRequest(Severity.ERROR, Version.BASE)
                    .setMessage("Failed to interpolate file location " + path + " for profile " + profile.getId() + ": "
                            + e.getMessage())

    }

    public interface ContentTransformer {
        /**
         * Interpolate the value read from the xpp3 document
         *
         * @param source    the source value
         * @param fieldName a description of the field being interpolated. The implementation may use this to
         *                  log stuff
         * @return the interpolated value
         */
        String transform(String source, String fieldName);
    }

            }
        });

        interpolator.addValueSource(new MapBasedValueSource(context.getProjectProperties()));

        interpolator.addValueSource(new MapBasedValueSource(context.getUserProperties()));

        interpolator.addValueSource(new MapBasedValueSource(context.getSystemProperties()));

        String absolutePath = interpolator.interpolate(path, "");

      // index * (dataset.length - 1) / scale. If there is no remainder, we can just find the value
      // whose index in the sorted dataset equals the quotient; if there is a remainder, we
      // interpolate between that and the next value.

      // Since index and (dataset.length - 1) are non-negative ints, their product can be expressed
      // as a long, without risk of overflow:

    }

    @Override
    public MavenOptions interpolate(UnaryOperator<String> callback) {
        ArrayList<MavenOptions> interpolatedOptions = new ArrayList<>(options.size());
        for (MavenOptions o : options) {
            interpolatedOptions.add((MavenOptions) o.interpolate(callback));
        }
        return layerMavenOptions(interpolatedOptions);
    }