interface Transformer {
        /**
         * Interpolate the value read from the xml 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);
    }

             */
            Plugin plugin = Plugin.newBuilder()
                    .groupId(interpolator.apply(extension.getGroupId()))
                    .artifactId(interpolator.apply(extension.getArtifactId()))
                    .version(interpolator.apply(extension.getVersion()))
                    .build();

             */
            Plugin plugin = Plugin.newBuilder()
                    .groupId(interpolator.apply(extension.getGroupId()))
                    .artifactId(interpolator.apply(extension.getArtifactId()))
                    .version(interpolator.apply(extension.getVersion()))
                    .build();

    public static 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);

        }
    }

    public void substitute() {
        substitute(callback);
    }

    public void substitute(UnaryOperator<String> callback) {
        new DefaultInterpolator().interpolate(storage, callback);
    }

    /**
     * Writes the properties file to the given writer, preserving as much of its
     * structure as possible.
     *
     * @param out the writer

        }
    }

    public void substitute() {
        substitute(callback);
    }

    public void substitute(UnaryOperator<String> callback) {
        new DefaultInterpolator().interpolate(storage, callback);
    }

    /**
     * Writes the properties file to the given writer, preserving as much of its
     * structure as possible.
     *
     * @param out the writer

RegexBasedInterpolat { private java.util.List valueSources; public void RegexBasedInterpolat(); public void RegexBasedInterpolat(java.util.List); public void addValueSource(ValueSource); public void removeValuesSource(ValueSource); public String interpolate(String, String); } org/codehaus/plexus/util/interpolation/ValueSource.class package org.codehaus.plexus.util.interpolation; public abstract interface ValueSource { public abstract Object getValue(String); } org/codehaus/plexus/util/InterpolationFilterR.class...

                            Severity.WARNING,
                            Version.V30,
                            prefix + path,
                            null,
                            "Failed to interpolate profile activation property " + s + ": " + propertyName
                                    + " expressions are not supported during profile activation.",
                            locationSupplier.get());
                }

        }

        populateProperties(cliRequest.commandLine, paths, cliRequest.systemProperties, cliRequest.userProperties);

        // now that we have properties, interpolate all arguments
        UnaryOperator<String> callback = v -> {
            String r = paths.getProperty(v);
            if (r == null) {
                r = cliRequest.systemProperties.getProperty(v);
            }

                        .connection("${test}/somepath")
                        .build())
                .build());

        ModelInterpolator interpolator = createInterpolator();

        final SimpleProblemCollector collector = new SimpleProblemCollector();
        Model out = interpolator.interpolateModel(model, new File("."), createModelBuildingRequest(context), collector);

        assertProblemFree(collector);