code: private static MappedField checkGetAccessor(XML xml, Class<?> aClass, Field nestedField){
  		
  		MappedField field = new MappedField(nestedField);
  		xml.fillMappedField(aClass, field);
  		Annotation.fillMappedField(aClass,field);
  		verifyGetterMethods(aClass,field);
  		return field;
  	}
docs: Checks only get accessor of this field.
  @param xml used to check xml configuration
  @param aClass class where is the field with the nested mapping
  @param nestedField field with nested mapping