public boolean contains(String name) {
		return symbols.containsKey(name);
	}
Check if the grammar contains any symbol with the given name

@param name the name to find
@return true iff a terminal or non-terminal has the given name
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/app/plugin/assembler/sleigh/grammars/AbstractAssemblyGrammar.java