public String getContentType() {
		if (!isDone()) {
			throw new IllegalStateException("task has not completed");
		}
		return contentType;
	}
Get the discovered content type (e.g., "Program")
@return content type or null if error occured or unsupported URL content
@throws IllegalStateException if task has not completed execution
Ghidra/Framework/Project/src/main/java/ghidra/framework/protocol/ghidra/ContentTypeQueryTask.java