fnIncreaseSections = function (oNode) {
				if (!oNode) {
					return;
				}
				var iMaxGroupSize = this._getMaxGroupSize(oNode);

				// adapt node sections if the page size increased since the last getcontexts call
				// and only if we do not already have a count for the group
				var oNodeState = oNode.nodeState;
				if (iMaxGroupSize === undefined) {
					var aNewSections = [];
					for (var i = 0; i < oNodeState.sections.length; i++) {
						var oCurrentSection = oNodeState.sections[i];
						oCurrentSection.length = Math.max(oCurrentSection.length, this._iPageSize);
						aNewSections = TreeBindingUtils.mergeSections(aNewSections, oCurrentSection);
					}
					oNodeState.sections = aNewSections;
				}
			}
Increases the section length of all sections of all nodes in the tree. This is necessary in case the page size increases between requests.
Otherwise unnecessary requests would be performed, because the section length does not match the requested page size.

@private