It might be required for you to import the package if you encounter any issues (like casting an Array), so better be safe than sorry and add the import.
import crafttweaker.entity.Attribute;

ZenGetter	GetterMethod	返回值类型
ZenGetter name（名称）	GetterMethod getName()	返回值类型 string
ZenGetter defaultValue	GetterMethod getDefaultValue()	返回值类型 double
ZenGetter shouldWatch	GetterMethod getShouldWatch()	返回值类型 布尔值
ZenGetter parent	GetterMethod getParent()	返回值类型 IEntityAttribute

• double clampValue(double Value) → Does something...