question: public void addParameter ( NameValuePair param ) throws IllegalArgumentException { log . trace ( "enter PostMethod.addParameter(NameValuePair)" ) ; if ( param == null ) { throw new IllegalArgumentException ( "NameValuePair may not be null" ) ; } addParameter ( param . getName ( ) , param . getValue ( ) ) ; }
target:  Adds a new parameter to be used in the POST request body.