public boolean isEmpty ( ) { assert java.lang.Thread . METHOD_1 ( this ) ; synchronized ( this ) { return ( VAR_1 . METHOD_2 ( ) . METHOD_3 ( ) ) == 0 ; } } 

public boolean isEmpty ( ) { assert java.lang.Thread . METHOD_1 ( this ) ; synchronized ( VAR_1 ) { return ( VAR_1 . METHOD_2 ( ) . METHOD_3 ( ) ) == 0 ; } } 
