public TYPE_1 METHOD_1 ( TYPE_1 p ) { if ( p == null ) throw new java.lang.NullPointerException ( ) ; if ( ( size ( ) ) == 0 ) return null ; return METHOD_1 ( p , VAR_1 , true ) ; } 

public TYPE_1 METHOD_1 ( TYPE_1 p ) { if ( p == null ) throw new java.lang.NullPointerException ( ) ; if ( isEmpty ( ) ) return null ; return METHOD_1 ( p , VAR_1 , true ) ; } 
