package ini
newExpression will return an expression AST. Expr represents an expression grammar: expr -> string | number
func ( Token) AST {
	return newASTWithRootToken(ASTKindExpr, )
}

func ( AST,  Token) AST {
	return newASTWithRootToken(ASTKindEqualExpr, , )
}
EqualExprKey will return a LHS value in the equal expr
func ( AST) string {
	 := .GetChildren()
	if len() == 0 || .Kind != ASTKindEqualExpr {
		return ""
	}

	return string([0].Root.Raw())