function updateDependents() {
			return SyncPromise.all(that.getDependentBindings().map(function (oDependentBinding) {
				return oDependentBinding.checkUpdateInternal();
			}));
		}
Checks whether the given context (or any context of this binding) may be kept alive.

@param {sap.ui.model.odata.v4.Context} [oContext]
  A context of this binding
@param {boolean} [bKeepAlive]
  Whether to keep the given context alive
@throws {Error}
  If <code>oContext.setKeepAlive(bKeepAlive)</code> is not allowed for the given (or any)
  context

@abstract
@function
@name sap.ui.model.odata.v4.ODataParentBinding#checkKeepAlive
@private
@see sap.ui.model.odata.v4.Context#setKeepAlive