question: the names of the fields that are currently being processed due to an indexdocuments action . concode_field_sep com.amazonaws.internal.ListWithAutoConstructFlag<String> fieldNames concode_field_sep int hashCode concode_elem_sep boolean equals concode_elem_sep String toString concode_elem_sep IndexDocumentsResult withFieldNames concode_elem_sep IndexDocumentsResult withFieldNames concode_elem_sep void setFieldNames
target: java . util . List < String > function ( ) { if ( fieldNames == null ) { fieldNames = new com . amazonaws . internal . ListWithAutoConstructFlag < String > ( ) ; fieldNames . setAutoConstruct ( true ) ; } return fieldNames ; }