private void popContext() {
if (nameStack.size() > 0) namesMap = (LinkedHashMap) nameStack.pop();
if (typeStack.size() > 0) typeVariablesMap = (HashMap) typeStack.pop();
}
/**
* Save a stack of names and type vars maps. Given argument is list of bindings from which we
* construct a linked map to store names
*
* @param linkedHashMap
*/
private void pushContext(Map bindings) {
nameStack.push(namesMap);
typeStack.push(typeVariablesMap);
namesMap = new LinkedHashMap(bindings);
typeVariablesMap = new HashMap();
}