/// <summary>
/// Throws <see cref="ArgumentException"/> if the
/// dimension is not recognized. Otherwise, returns the
/// <see cref="DimConfig"/> for this dimension.
/// </summary>
protected virtual DimConfig VerifyDim(string dim)
{
DimConfig dimConfig = m_config.GetDimConfig(dim);
if (!dimConfig.IndexFieldName.Equals(m_indexFieldName))
{
throw new System.ArgumentException("dimension \"" + dim + "\" was not indexed into field \"" + m_indexFieldName);
}
return(dimConfig);
}