public boolean isFrom(File dir) {
			return FileUtilities.isPathContainedWithin(dir, pluginFile);
		}
Finds all plugin classes loaded from a particular extension folder.
<p>
This uses the {@link ClassSearcher} to find all <code>Plugin.class</code> objects on the
classpath. For each class, the original resource file is compared against the
given extension folder and the jar files for that extension. 

@param extension the extension from which to find plugins
@param pluginPaths all loaded plugin paths
@return list of {@link Plugin} classes, or empty list if none found
Ghidra/Framework/Project/src/main/java/ghidra/framework/project/tool/ExtensionManager.java