question: public FormLayout ( ColumnSpec [ ] colSpecs , RowSpec [ ] rowSpecs ) { checkNotNull ( colSpecs , "The column specifications must not be null." ) ; checkNotNull ( rowSpecs , "The row specifications must not be null." ) ; this . colSpecs = new ArrayList < ColumnSpec > ( Arrays . asList ( colSpecs ) ) ; this . rowSpecs = new ArrayList < RowSpec > ( Arrays . asList ( rowSpecs ) ) ; colGroupIndices = new int [ ] [ ] { } ; rowGroupIndices = new int [ ] [ ] { } ; int initialCapacity = colSpecs . length * rowSpecs . length / 4 ; constraintMap = new HashMap < Component , CellConstraints > ( initialCapacity ) ; componentSizeCache = new ComponentSizeCache ( initialCapacity ) ; minimumWidthMeasure = new MinimumWidthMeasure ( componentSizeCache ) ; minimumHeightMeasure = new MinimumHeightMeasure ( componentSizeCache ) ; preferredWidthMeasure = new PreferredWidthMeasure ( componentSizeCache ) ; preferredHeightMeasure = new PreferredHeightMeasure ( componentSizeCache ) ; }
target:  Constructs a FormLayout using the given column and row specifications.