protected AssemblyNumericSymbols getNumericSymbols() {
		synchronized (lock) {
			if (symbols != null) {
				return symbols;
			}
			if (program == null) {
				symbols = AssemblyNumericSymbols.fromLanguage(lang);
			}
			else {
				symbols = AssemblyNumericSymbols.fromProgram(program);
			}
			return symbols;
		}
	}
A convenience to obtain assembly symbols

@return the map
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/app/plugin/assembler/sleigh/AbstractSleighAssembler.java