public default DecompilerHighlighter createHighlighter(String id, CTokenHighlightMatcher tm) {
		return createHighlighter(id, null, tm);
	}
A version of {@link #createHighlighter(String, CTokenHighlightMatcher)} that allows clients
to specify an ID.  This ID will be used to ensure that any existing highlighters with that
ID will be removed before creating a new highlighter.  The highlighter created will be 
applied to every decompiled function.  

<p>This method is convenient for scripts, since a script cannot hold on to any created
highlighters between repeated script executions.   A good value for script writers to use
is the name of their script class.

@param id the ID
@param tm the matcher
@return the new highlighter
Ghidra/Features/Decompiler/src/main/java/ghidra/app/decompiler/DecompilerHighlightService.java