question: public static boolean shouldLoad ( String id , ChunkLoadBehaviour behav ) { if ( isCritical ( id ) ) return true ; switch ( behav ) { case LOAD_CHUNK_ALWAYS : return true ; case LOAD_CHUNK_IF_SAFE : return isSafeToCopy ( id ) ; case LOAD_CHUNK_NEVER : return false ; case LOAD_CHUNK_MOST_IMPORTANT : return id . equals ( PngChunkTRNS . ID ) ; } return false ; }
target:  Decides if a chunk should be loaded, according to a ChunkLoadBehaviour