DivinerRenderer.php
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			<?php

			abstract class DivinerRenderer {

			private $publisher;
			private $atomStack;

			public function setPublisher($publisher) {
			$this->publisher = $publisher;
			return $this;
			}

			public function getPublisher() {
			return $this->publisher;
			}

			public function getConfig($key, $default = null) {
			return $this->getPublisher()->getConfig($key, $default);
			}

			protected function pushAtomStack(DivinerAtom $atom) {
			$this->atomStack[] = $atom;
			return $this;
			}

			protected function peekAtomStack() {
			return end($this->atomStack);
			}

			protected function popAtomStack() {
			array_pop($this->atomStack);
			return $this;
			}

			abstract public function renderAtom(DivinerAtom $atom);
			abstract public function renderAtomSummary(DivinerAtom $atom);
			abstract public function renderAtomIndex(array $refs);
			abstract public function getHrefForAtomRef(DivinerAtomRef $ref);

			}

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