removeListener(listener);
    }

    private void assertProjectMutatingMethodAllowed(String methodName) {
        MutationGuards.of(crossProjectConfigurator).assertMutationAllowed(methodName, this, Gradle.class);
    }

    @Override
    public void beforeProject(Closure closure) {

            ? null
            : nextBatch.getSource();
    }

    private void assertMutatingMethodAllowed(String methodName) {
        MutationGuards.of(getProjectConfigurator()).assertMutationAllowed(methodName, this, Project.class);
    }

    @Override
    public ProjectState getOwner() {
        return owner;
    }

    @Override