/// <summary>
/// Looks for missing symbols in the provided statement.
/// </summary>
/// <param name="statement">The statement.</param>
/// <returns>The found list of missing symbols.</returns>
public static List <VariableExpression> FindMissingSymbols(this IStatement statement)
{
var missingSymbols = new List <VariableExpression>();
statement.CollectMissingSymbols(missingSymbols);
return(missingSymbols);
}