/*xml
   <module name="Checker">
     <module name="TreeWalker">
       <module name="LambdaParameterName">
         <property name="format" value="^[a-z]([a-zA-Z]+)*$"/>
       </module>
     </module>
   </module>
   */
  
  package com.puppycrawl.tools.checkstyle.checks.naming.lambdaparametername;
  
  import java.util.function.Function;
  
  import java.util.stream.Stream;
  
  // xdoc section -- start
  class Example2 {
    Function<String, String> function1 = str -> str.toUpperCase().trim();
    Function<String, String> function2 = _s -> _s.trim();
    // violation above 'Name '_s' must match pattern'
  
    public boolean myMethod(String sentence) {
      return Stream.of(sentence.split(" "))
              .map(word -> word.trim())
              .anyMatch(Word -> "in".equals(Word));
      // violation above 'Name 'Word' must match pattern'
    }
  }
  // xdoc section -- end