public Map<String, String> copyTo(Map<String, String> map) {
    map.putAll(environmentVariables().toMap());
    return map;
  }
public Map < String , String > copyTo ( Map < String , String > map ) { map . putAll ( environmentVariables ( ) . toMap ( ) ) ; return map ; }
Copies the contents of this {@link Environment} to the given {@link Map}.

@param map {@link Map} in which to copy the contents of this {@link Environment}.
@return the given {@link Map}.
@throws NullPointerException if {@link Map} is {@literal null}.
@see #environmentVariables()
@see java.util.Map