public String toString() {
        return getGroupId() + ":" + getArtifactId() + ":" + getVersion() + ":"
                + (getClassifier() == null ? "" : getClassifier()) + ":"
                + (getType() == null ? DEFAULT_TYPE : getType());
    }

                && Objects.equals(d1.getArtifactId(), d2.getArtifactId())
                && Objects.equals(d1.getVersion(), d2.getVersion())
                && Objects.equals(d1.getType(), d2.getType())
                && Objects.equals(d1.getClassifier(), d2.getClassifier())
                && Objects.equals(d1.getScope(), d2.getScope())
                && Objects.equals(d1.getSystemPath(), d2.getSystemPath())

        } else {
            ArtifactType type = null;
            if (request.getType() != null) {
                type = session.getSession().getArtifactTypeRegistry().get(request.getType());
            }
            String str1 = request.getClassifier();
            String classifier = str1 != null && !str1.isEmpty()

            for (ToolchainModel model : toolchains.getToolchains()) {
                if (!groupedToolchains.containsKey(model.getType())) {
                    groupedToolchains.put(model.getType(), new ArrayList<>());
                }

                groupedToolchains.get(model.getType()).add(model);
            }

            request.setToolchains(groupedToolchains);
        }
        return request;
    }

          <code>
            <![CDATA[
    /**
     * Computes a hash value based on {@link #getType()} and {@link #getProvides()} values.
     */
    public int hashCode() {
        return java.util.Objects.hash(getType(), getProvides());
    } //-- int hashCode()

    /**
     * Checks equality based on {@link #getType()} and {@link #getProvides()} values.
     */
    public boolean equals(Object other) {

        nonNull(request, "request");
        InternalSession session = InternalSession.from(request.getSession());

        ArtifactType type = null;
        if (request.getType() != null) {
            type = session.getSession().getArtifactTypeRegistry().get(request.getType());
        }
        if (request.getCoordinateString() != null) {
            return new DefaultDependencyCoordinate(
                    session,

        this(
                message,
                artifact.getGroupId(),
                artifact.getArtifactId(),
                artifact.getVersion(),
                artifact.getType(),
                artifact.getClassifier(),
                null,
                artifact.getDownloadUrl(),
                artifact.getDependencyTrail());
    }

    protected ArtifactNotFoundException(

    protected DefaultToolchain(ToolchainModel model, String type, Logger logger) {
        this(model, logger);
        this.type = type;
    }

    @Override
    public final String getType() {
        return type != null ? type : model.getType();
    }

    @Override
    public final ToolchainModel getModel() {
        return model;
    }

    public final void addProvideToken(String type, RequirementMatcher matcher) {

        DefaultToolchain toolchain = newDefaultToolchain(model, "TYPE");
        assertEquals("TYPE", toolchain.getType());

        model.setType("MODEL_TYPE");
        toolchain = newDefaultToolchain(model);
        assertEquals("MODEL_TYPE", toolchain.getType());
    }

    @Test
    void testGetLogger() {
        ToolchainModel model = new ToolchainModel();

            }

            @Override
            public String getExtension() {
                return getType().getExtension();
            }

            @Override
            public Type getType() {
                String type = dependency.getType();
                return session.requireType(type);
            }

            @Nonnull
            @Override