/// <summary>Gets a variable's definition.</summary>
/// <param name="source">The source.</param>
/// <param name="name">The variable name.</param>
/// <returns>The variable.</returns>
/// <exception cref="KeyNotFoundException">The variable does not exist.</exception>
/// <exception cref="Exception">An error occurred getting the variable.</exception>
/// <remarks>
/// The variable is locked for reading while the value is read.
/// </remarks>
public static Variable GetInfo(this VariableDispenser source, string name)
{
var variable = source.TryGetInfo(name);
if (variable != null)
{
return(variable);
}
throw new KeyNotFoundException("Variable not found.");
}