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Get method documentation [Android Documentation]
Returns the current number of rows. This is either the last value that was set
 with GridLayout.RowCount or, if no such value was set, the maximum
 value of each the upper bounds defined in NoType:android/widget/GridLayout$LayoutParams;Href=../../../reference/android/widget/GridLayout.LayoutParams.html#rowSpec.
Set method documentation [Android Documentation]
RowCount is used only to generate default row/column indices when
 they are not specified by a component's layout parameters.