static createVariableDeclarationAndNewExpressionNode(name, className, loc) {
    const node = {
      type: 'VariableDeclaration',
      kind: 'let',
      loc: loc,
      declarations: [
        {
          type: 'VariableDeclarator',
          id: {type: 'Identifier', name: name},
          init: {type: 'NewExpression', callee: {type: 'Identifier', name: className}}
        }
      ]
    };

    return node;
  }
create VariableDeclaration node which has NewExpression.
@param {string} name - variable name.
@param {string} className - class name.
@param {Object} loc - location.
@returns {ASTNode} created node.