question: ensures that an object reference passed as a parameter to the calling method is not null . concode_field_sep PlaceHolder placeHolder concode_field_sep void checkState concode_elem_sep void checkState concode_elem_sep void checkState concode_elem_sep String format concode_elem_sep void checkArgument concode_elem_sep void checkArgument concode_elem_sep void checkArgument
target: T function ( T arg0 , Object arg1 ) { if ( arg0 == null ) { throw new ElasticsearchNullPointerException ( String . valueOf ( arg1 ) ) ; } return arg0 ; }