您会觉得很傻，至少当我注意到问题时才这样做.从环境类项目中提取的内容中，您有一个&"符号.

Y'er gonna feel kind of silly, at least I did when I noticed the problem. You have an ampersand insead of a dollar-sign in the extraction from the envirnment-class-item.

a <- ClassA$new(myVar=1)
a$someMethod(2)
#[1] "hi