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hiding the last field in a ListGrid

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SmartClient Version: v9.1p_2014-10-20/PowerEdition Deployment (built 2014-10-20)
IE-11
GWT 2.6.1

I have a ListGrid where the columns are dynamically selected in our UI from another widget. So when I go to change which fields are shown/hidden I do it with this approach:

1. Hide all fields
2. Show fields in new selection of fields to show

So when I try to hide all the fields in 1 call using ListGrid.hideFields() I see an Error in the log that looks like this:
Code:

ERROR: 14:48:13.645:WARN:ListGrid:isc_PivotTableGrid_4_0:Attempt to hide all fields in one call - disallowed.
com.smartgwt.client.core.JsObject$SGWT_WARN: 14:48:13.645:WARN:ListGrid:isc_PivotTableGrid_4_0:Attempt to hide all fields in one call - disallowed.
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
        at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:105)
        at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
        at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172)
        at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:338)
        at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:219)
        at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136)
        at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:576)
        at com.google.gwt.dev.shell.ModuleSpace.invokeNativeVoid(ModuleSpace.java:304)
        at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeVoid(JavaScriptHost.java:107)
        at com.smartgwt.client.widgets.grid.ListGrid.hideField(ListGrid.java)
        at com.anstca.tz.client.floater.pivottable.view.PivotTableGrid.setFieldsForDisplay(PivotTableGrid.java:873)
        at com.anstca.tz.client.floater.pivottable.controller.ModelMediator.updatePivotTableFields(ModelMediator.java:61)
        at com.anstca.tz.client.floater.pivottable.view.SelectionPanelMeasure$UpdatePivotTableFields.execute(SelectionPanelMeasure.java:355)
        at com.anstca.tz.client.common.util.DeferredCommand$1.run(DeferredCommand.java:32)
        at com.google.gwt.user.client.Timer.fire(Timer.java:140)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
        at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
        at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172)
        at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:338)
        at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:219)
        at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136)
        at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:576)
        at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:284)
        at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:91)
        at com.google.gwt.core.client.impl.Impl.apply(Impl.java)
        at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:356)
        at sun.reflect.GeneratedMethodAccessor47.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
        at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
        at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172)
        at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessages(BrowserChannelServer.java:293)
        at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:547)
        at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:364)
        at java.lang.Thread.run(Thread.java:744)

I get the same error when I try to iterate through all fields using ListGrid.hideField(String fieldname) and on the last field when it tries to hide it, I get the same error above?

Is there another way to hide the last field w/o this error?

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