public void LayoutRow(NkLayoutFormat fmt, float height, int cols, float[] ratio)
 {
     fixed(float *ptr = ratio)
     {
         Nk.nk_layout_row(_ctx, fmt, height, cols, ptr);
     }
 }
 public void LayoutSpaceBegin(NkLayoutFormat fmt, float height, int widget_count)
 {
     Nk.nk_layout_space_begin(_ctx, fmt, height, widget_count);
 }
 public void LayoutRowBegin(NkLayoutFormat fmt, float row_height, int cols)
 {
     Nk.nk_layout_row_begin(_ctx, fmt, row_height, cols);
 }
 public void RowLayout(NkLayoutFormat fmt, float height, int cols, int width)
 {
     Nk.nk_row_layout_(_ctx, fmt, height, cols, width);
 }