grails – Groovy：在静态范围内找到了表观变量xyz,但没有引用局

所以下面的代码产生一个红色的x

Groovy:Apparent variable ‘ExampleB’ was found in a static scope but doesn’t refer to a local variable,static
field or class. Possible causes:

package domain.com.so;

class ExampleA {
    static belongsTo  = [exampleB: ExampleB]
    static constraints = {
    }
}

此代码产生一个简单的错误：

Groovy:Apparent variable ‘ExampleA’ was found in a static scope but doesn’t refer to a local variable,static field
or class. Possible causes:

package domain.com.so;

class ExampleB {
    static hasMany  = [exampleAs: ExampleA]
    static constraints = {
    }
}