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// @ts-nocheck
/**
* 检查一个值是否已定义（不为 undefined）且不为 null
* @param value 要检查的值
* @returns 如果值已定义且不为 null，则返回 true；否则返回 false
*/
export function isDef(value: unknown): boolean {
return value !== undefined && value !== null;
}