| ExpressionBasedRowEvaluable | 
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| ExpressionValueFacetAggregator<T extends FacetState> | 
 Base class for facet aggregators which update their state by evaluating an expression and aggregating its result. 
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| HistogramState | 
 Stores a histogram of numerical values, used in range facets. 
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| NumericFacetAggregator | 
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| NumericFacetState | 
 The aggregation state of a numeric facet, which contains two histograms: - the histogram for the rows seen by the
 facet (the ones selected by all other active facets) - called the view histogram - the histogram for all rows, which
 is used to determine the bin size, called the global histogram. 
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| ScatterplotFacetAggregator | 
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| ScatterplotFacetState | 
 Stores the x and y coordinates of all points encountered so far by the facet aggregator. 
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| ScatterplotRowFilter | 
 Filters rows according to the settings of a scatterplot facet. 
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| StringValuesFacetAggregator | 
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| StringValuesFacetState | 
 Gathers statistics about distinct string representations of values generated by an evaluable. 
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| TimeRangeFacetAggregator | 
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| TimeRangeFacetState | 
 The aggregation state of a timeline facet, gathering statistics about the entire table and the rows in view (selected
 by other facets). 
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| TimeRangeStatistics | 
 Stores statistics related to time values stored in a set of rows (generated by an expression). 
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