obtains value of the coreprotocolpnames #user_agent parameter.if not set , returns null . concode_field_sep PlaceHolder placeHolder concode_field_sep ProtocolVersion getVersion concode_elem_sep boolean useExpectContinue concode_elem_sep void setHttpElementCharset concode_elem_sep void setVersion concode_elem_sep void setUserAgent concode_elem_sep String getContentCharset concode_elem_sep void setUseExpectContinue concode_elem_sep String getHttpElementCharset concode_elem_sep void setContentCharset
String function ( final HttpParams arg0 ) { if ( arg0 == null ) { throw new IllegalArgumentException ( "srini_string" ) ; } return ( String ) arg0 . getParameter ( CoreProtocolPNames . USER_AGENT ) ; }