public void appendComment(StructureContext<?> structureContext, CommentType commentType,
			String prefix, String comment, String sep) throws IOException {
		DWARFUtil.appendComment(program, structureContext.getStructureAddress(), commentType,
			prefix, comment, sep);
	}
Adds a comment to the specified structure, appending to any previous values
already there.  If the existing comment already contains the specified comment value,
the operation is skipped.

@param structureContext the structure
@param commentType {@link CommentType} enum 
@param prefix String prefix to place in front of the comment string
@param comment String value to append
@param sep separator to use between existing comments (for example, "\n")
@throws IOException if error adding comment
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/golang/structmapping/MarkupSession.java