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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.