@Nullable
	public WorkspaceComments getWorkspaceComments(@Nonnull Workspace workspace) {
		String input = CommentKey.workspaceInput(workspace);
		PersistWorkspaceComments persistComments = persistMap.get(input);
		if (persistComments == null)
			return null; // No persist model, so there are no comments.

		// Wrap the persist model with a delegating model for listener support.
		return delegatingMap.computeIfAbsent(input, i -> newDelegatingWorkspaceComments(workspace, persistComments));
	}
@param workspace
		Workspace to check for comments.

@return Comments container for the given workspace, if any comments exist.
If there are no comments, then {@code null}.
recaf-core/src/main/java/software/coley/recaf/services/comment/CommentManager.java