'宣言
Public Function GetEnumerator() As System.Collections.Generic.IEnumerator(Of Subindex(Of T))
public System.Collections.Generic.IEnumerator<Subindex<T>> GetEnumerator()
'宣言
Public Function GetEnumerator() As System.Collections.Generic.IEnumerator(Of Subindex(Of T))
public System.Collections.Generic.IEnumerator<Subindex<T>> GetEnumerator()