whole_func_string: function(key, root, sourceText) {
  	this.key = key;
  	this.rootExpr = root;
  	canReflect.setKeyValue(this, sourceTextSymbol, sourceText);
  }
func_code_string: function(key, root, sourceText) {
  	this.key = key;
  	this.rootExpr = root;
  	canReflect.setKeyValue(this, sourceTextSymbol, sourceText);
  }
func_documentation_string: ### Lookup `new Lookup(String, [Expression])` Finds a value in the scope or a helper.