ensures that an object reference is not null . concode_field_sep PlaceHolder placeHolder concode_field_sep String checkNotEmpty concode_elem_sep String checkNotEmpty concode_elem_sep void checkState concode_elem_sep void checkState concode_elem_sep void checkMainThread concode_elem_sep void checkArgument concode_elem_sep void checkArgument
T function ( T arg0 , Object arg1 ) { if ( ExoPlayerLibraryInfo . ASSERTIONS_ENABLED && arg0 == null ) { throw new NullPointerException ( String . valueOf ( arg1 ) ) ; } return arg0 ; }