/// <summary>
/// Creates a new on-set clause for setting variables, and adds a variable to set.
/// </summary>
/// <param name="expression">is the assignment expression providing the new variable value</param>
/// <returns>on-set clause</returns>
public static OnSetClause Create(Expression expression)
{
var clause = new OnSetClause();
clause.AddAssignment(expression);
return(clause);
}