question: an java.util.concurrent.executor that executes tasks containedin parallel . concode_field_sep Executor immediate concode_elem_sep ThreadLocal<Integer> executionDepth concode_elem_sep ExecutorService background concode_elem_sep BoltsExecutors INSTANCE concode_elem_sep int MAX_DEPTH concode_field_sep boolean isAndroidRuntime concode_elem_sep int incrementDepth concode_elem_sep Executor immediate concode_elem_sep void execute concode_elem_sep int decrementDepth
target: ExecutorService function ( ) { return INSTANCE . background ; }