Bug 3616 No icon for method parameters in code assist list (1GD014D)
Trigger code assist in a method with parameters so that a parameter name shows in the list. Note that the parameter name has no icon. NOTES:
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/JavaPluginImages.java
private static ImageDescriptor createManaged(String prefix, String name) {
		try {
			ImageDescriptor result= ImageDescriptor.createFromURL(makeIconFileURL(prefix, name.substring(NAME_PREFIX_LENGTH)));
			IMAGE_REGISTRY.put(name, result);
			return result;
		} catch (MalformedURLException e) {
			return ImageDescriptor.getMissingImageDescriptor();
		}
	}
	
	private static ImageDescriptor create(String prefix, String name) {
		try {
			return ImageDescriptor.createFromURL(makeIconFileURL(prefix, name));
		} catch (MalformedURLException e) {
			return ImageDescriptor.getMissingImageDescriptor();
		}
	}
	
	private static URL makeIconFileURL(String prefix, String name) throws MalformedURLException {
		if (fgIconBaseURL == null)
			throw new MalformedURLException();
			
		StringBuffer buffer= new StringBuffer(prefix);
		buffer.append('/');
		buffer.append(name);
		return new URL(fgIconBaseURL, buffer.toString());
	}	
}