question: creates a `` only one '' child condition concode_field_sep PlaceHolder placeHolder concode_field_sep LangCondition createLangCondition concode_elem_sep CombinatorCondition createOrCondition concode_elem_sep PositionalCondition createPositionalCondition concode_elem_sep AttributeCondition createBeginHyphenAttributeCondition concode_elem_sep Condition createOnlyTypeCondition concode_elem_sep NegativeCondition createNegativeCondition concode_elem_sep ContentCondition createContentCondition concode_elem_sep AttributeCondition createIdCondition concode_elem_sep AttributeCondition createAttributeCondition concode_elem_sep AttributeCondition createPseudoClassCondition concode_elem_sep AttributeCondition createOneOfAttributeCondition concode_elem_sep CombinatorCondition createAndCondition concode_elem_sep AttributeCondition createClassCondition
target: Condition function ( ) { return null ; }