Grid container used to arrange elements in a grid like layout. Grid container will arrange its children in a grid like structure, the grid columns are specified using the [member columns] property and the number of rows will be equal to the number of children in the container divided by the number of columns. For example, if the container has 5 children, and 2 columns, there will be 3 rows in the container. Notice that grid layout will preserve the columns and rows for every size of the container. The number of columns in the [GridContainer]. If modified, [GridContainer] reorders its children to accommodate the new layout.