impl xs models impl dtd models CMNode impl dtd models CMStateSet impl xs XSModelGroupImpl xscmbinop cmnode xscmbinop type cmnode leftnode cmnode rightnode type type xsmodelgroupimpl.modelgroup_choice type xsmodelgroupimpl.modelgroup_sequence fleftchild leftnode frightchild rightnode cmnode getleft fleftchild cmnode getright frightchild isnullable type xsmodelgroupimpl.modelgroup_choice fleftchild.isnullable frightchild.isnullable type xsmodelgroupimpl.modelgroup_sequence fleftchild.isnullable frightchild.isnullable calcfirstpos cmstateset type xsmodelgroupimpl.modelgroup_choice toset.setto fleftchild.firstpos toset.union frightchild.firstpos type xsmodelgroupimpl.modelgroup_sequence toset.setto fleftchild.firstpos fleftchild.isnullable toset.union frightchild.firstpos calclastpos cmstateset type xsmodelgroupimpl.modelgroup_choice toset.setto fleftchild.lastpos toset.union frightchild.lastpos type xsmodelgroupimpl.modelgroup_sequence toset.setto frightchild.lastpos frightchild.isnullable toset.union fleftchild.lastpos cmnode fleftchild cmnode frightchild