static boolean isVowel ( char c ) {
  if ( c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u' ) return true ;
  return false ;
}

static boolean isVowel ( char c ) { if ( c == ' a ' || c == ' e ' || c == ' i ' || c == ' o ' || c == ' u ' ) return true ; return false ; }
(method_declaration (modifiers) type: (boolean_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (character_literal)) right: (binary_expression left: (identifier) right: (character_literal))) right: (binary_expression left: (identifier) right: (character_literal))) right: (binary_expression left: (identifier) right: (character_literal))) right: (binary_expression left: (identifier) right: (character_literal)))) consequence: (return_statement (true))) (return_statement (false))))