public boolean contains ( TYPE_1 p ) { if ( p == null ) { throw new java.lang.NullPointerException ( STRING_1 ) ; } return ( this . METHOD_1 ( p ) ) != null ; } 

public boolean contains ( TYPE_1 p ) { if ( p == null ) { throw new java.lang.NullPointerException ( STRING_1 ) ; } return ( this . METHOD_1 ( p , true ) ) != null ; } 
