public void Clear()
{
_schema = null;
Path.Clear();
Variables.Clear();
Fragments.Clear();
UsedVariables.Clear();
UnusedVariables.Clear();
DeclaredVariables.Clear();
Names.Clear();
Types.Clear();
Directives.Clear();
OutputFields.Clear();
InputFields.Clear();
Errors.Clear();
IsInError = false;
}
