code: private static JMapAccessor getFieldAccessors(Class<?> clazz, Field field,boolean isOpposite, String... fieldNames){
  		for (String fieldName : fieldNames) {
  			JMapAccessor accessor = getAccessor(clazz,field.getAnnotations(),fieldName,isOpposite);
  			if(!isNull(accessor)) return accessor;
  		}
  		return null;
  	}
docs: Checks if this field contains a definition of accessors for the name given as input.
  @param clazz class to check
  @param field field to check
  @param isOpposite true if accessor methods to check belong to the opposite field, false otherwise
  @param fieldNames name to find
  @return JMapAccessor if exists, null otherwise