// Push receiver for index switch method.
mtd.mv().visitVarInsn( Opcodes.ALOAD, mtd.objectInContext() );
// Compute index value.
final ArrayDescriptor desc = _array.arrayDescriptor();
final int cols = desc.numberOfColumns();
if (cols == 1 && isNullOrZeroOrOne( _col )) {
// <row> - 1;
numCompiler.compileInt( _row );
mv.push( 1 );
mv.visitInsn( Opcodes.ISUB );