private static boolean happy ( Integer hh , Integer mm ) {
  return hh . toString ( ) . contains ( "7" ) || mm . toString ( ) . contains ( "7" ) ;
}

private static boolean happy ( Integer hh , Integer mm ) { return hh . toString ( ) . contains ( "7" ) || mm . toString ( ) . contains ( "7" ) ; }
(method_declaration (modifiers) type: (boolean_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier)) (formal_parameter type: (type_identifier) name: (identifier))) body: (block (return_statement (binary_expression left: (method_invocation object: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) name: (identifier) arguments: (argument_list (string_literal))) right: (method_invocation object: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) name: (identifier) arguments: (argument_list (string_literal)))))))