question: releases builder for reuse . concode_field_sep ThreadLocal<CachedBuilder> builders concode_elem_sep boolean used concode_elem_sep SB builder concode_field_sep CachedBuilder initialValue concode_elem_sep SB acquire concode_elem_sep SB acquire
target: void function ( SB arg0 ) { if ( this . builder == arg0 ) { arg0 . setLength ( 0 ) ; used = false ; } }