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+Allows you to run Composer within your build, to install dependencies prior to testing. Best run as a "setup" stage plugin.
+
+### Configuration Options:
+
+* **directory** - Optional - Directory within which you want Composer to run (defaults to build root.) 
+* **action** - Optional - Action you wish Composer to run (defaults to update.)
+* **prefer_dist** - Optional - true/false whether Composer should run with the `--prefer-dist` flag.
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