PivotCalculation        A class that defines a calculation.
PivotCalculationGroup   A class that defines a group of calculations.
PivotCalculationGroups
                        A class that contains multiple calculation
                        groups.
PivotCalculator         A class that computes the value of a cell.
PivotCell               A class that represents a cell in a pivot table
PivotCells              A class that contains the cells from a pivot
                        table.
PivotData               A class that contains named data frames.
PivotDataGroup          A class that defines a row or column heading.
PivotFilter             A class that defines a filter condition.
PivotFilters            A class that defines a set of filter conditions
PivotHtmlRenderer       A class that renders a pivot table in HTML.
PivotStyle              A class that specifies styling.
PivotStyles             A class that defines a collection of styles.
PivotTable              A class that defines a pivot table.
bhmtraindisruption      Birmingham Train Disruptions, Dec 2016-Feb
                        2017.
bhmtrains               Birmingham Trains, Dec 2016-Feb 2017.
checkArgument           Perform basic checks on a function argument.
getCompactTheme         Get the compact theme for styling a pivot
                        table.
getDefaultTheme         Get the default theme for styling a pivot
                        table.
getLargePlainTheme      Get the large plain theme for styling a pivot
                        table.
getSimpleColoredTheme   Get a simple coloured theme.
getTheme                Get a built-in theme for styling a pivot table.
pivottabler             Render a pivot table as a HTML widget.
pivottablerOutput       Standard function for Shiny scaffolding.
renderBasicTable        Output a table into a package vignette.
renderPivottabler       Standard function for Shiny scaffolding.
trainstations           Train Stations
