void addPostComment(Address address, String postComment) {
		String existingPostComment = blockPostComments.get(address);
		postComment =
			(existingPostComment == null) ? postComment : postComment + "\n" + existingPostComment;
		blockPostComments.put(address, postComment);
	}
Manages the nesting of scoping blocks for functions and scoped variables.
Ghidra/Features/PDB/src/main/java/ghidra/app/util/pdb/pdbapplicator/BlockCommentsManager.java