Reflects the type represented by key.
If key is not an instance of Type, then this function throws an
ArgumentError.
Optionally takes a list of typeArguments for generic classes. If the list
is provided, then the key must be a generic class type, and the number of
the provided type arguments must be equal to the number of type variables
declared by the class.
Note that since one cannot obtain a Type object from another isolate, this function can only be used to obtain type mirrors on types of the current isolate.
Source
external TypeMirror reflectType(Type key, [List<Type> typeArguments]);