code: public static VariablePattern fromPlate(String plateName, VariableNumMap plateVariables,
        VariableNumMap fixedVariables) {
      List<VariableNameMatcher> matchers = Lists.newArrayList();
      for (String variableName : plateVariables.getVariableNamesArray()) {
        matchers.add(new VariableNameMatcher(plateName + "/", "/" + variableName, 0));
      }
      return new VariableNamePattern(matchers, plateVariables, fixedVariables);
    }
docs: Gets a {@code VariableNamePattern} which matches {@code plateVariables} in each
  replication of {@code plateName}. {@code fixedVariables} are added to each
  match as well.
  
  @param plateName
  @param plateVariables
  @param fixedVariables
  @return