Empty interface{}

Can store any type of data

But when working with slices and maps, pay attention

[]interface{} or map[string]interface{}

May make this mistake cannot use (type []string) as type []interface {}

You cannot convert []T to []interface, nor can you convert map[string]T to map[string]interface{}

The Go language specification does not allow this because the two types do not have the same representation in memory.

Need to define separately []interface{} map[string]interface{}

Copy the element you want to convert to the above type

 For example, the following error:

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