question: private static int [ ] [ ] compileSizes ( final int parameters , final int order , final DSCompiler valueCompiler ) { final int [ ] [ ] sizes = new int [ parameters + 1 ] [ order + 1 ] ; if ( parameters == 0 ) { Arrays . fill ( sizes [ 0 ] , 1 ) ; } else { System . arraycopy ( valueCompiler . sizes , 0 , sizes , 0 , parameters ) ; sizes [ parameters ] [ 0 ] = 1 ; for ( int i = 0 ; i < order ; ++ i ) { sizes [ parameters ] [ i + 1 ] = sizes [ parameters ] [ i ] + sizes [ parameters - 1 ] [ i + 1 ] ; } } return sizes ; }
target:  Compile the sizes array.