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this._typeIds?this._typeIds.buffer:null}},{key:"append",value:function(t){return this.set(this.length,t)}},{key:"isValid",value:function(t){return this._isValid(t)}},{key:"set",value:function(t,e){return this.setValid(t,this.isValid(e))&&this.setValue(t,e),this}},{key:"setValue",value:function(t,e){this._setValue(this,t,e)}},{key:"setValid",value:function(t,e){return this.length=this._nulls.set(t,+e).length,e}},{key:"addChild",value:function(t){arguments.length>1&&void 0!==arguments[1]||"".concat(this.numChildren);throw new Error('Cannot append children to non-nested type "'.concat(this.type,'"'))}},{key:"getChildAt",value:function(t){return this.children[t]||null}},{key:"flush",value:function(){var t=[],e=this._values,n=this._offsets,r=this._typeIds,i=this.length,a=this.nullCount;r?(t[Ze.TYPE]=r.flush(i),n&&(t[Ze.OFFSET]=n.flush(i))):n?(e&&(t[Ze.DATA]=e.flush(n.last())),t[Ze.OFFSET]=n.flush(i)):e&&(t[Ze.DATA]=e.flush(i)),a>0&&(t[Ze.VALIDITY]=this._nulls.flush(i));var 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