=======================================
Class method with single parameter
=======================================

class A {
  private int GetBack(int b) {
    return b;
  }
}

---

(compilation_unit
  (class_declaration
    (identifier)
    (declaration_list
      (method_declaration
        (modifier)
        (predefined_type)
        (identifier)
        (parameter_list
          (parameter (predefined_type) (identifier)))
        (block
          (return_statement (identifier)))))))

=======================================
Class method with multiple parameters
=======================================

class A {
  void DoSomething(A a, B b) {
  }
}

---

(compilation_unit
  (class_declaration
    (identifier)
    (declaration_list
      (method_declaration
        (void_keyword)
        (identifier)
        (parameter_list
          (parameter (identifier) (identifier))
          (parameter (identifier) (identifier)))
        (block)))))

=======================================
Class generic method
=======================================

class A {
  void Accept<T>(T accept) {
  }
}

---

(compilation_unit
  (class_declaration
    (identifier)
    (declaration_list
      (method_declaration
        (void_keyword)
        (identifier)
        (type_parameter_list (type_parameter (identifier)))
        (parameter_list
          (parameter (identifier) (identifier)))
        (block)))))

=======================================
Class generic method with new type constraint
=======================================

class A {
  void Accept<T>(T accept) where T: new() {
  }
}

---

(compilation_unit
  (class_declaration
    (identifier)
    (declaration_list
      (method_declaration
        (void_keyword)
        (identifier)
        (type_parameter_list (type_parameter (identifier)))
        (parameter_list
          (parameter (identifier) (identifier)))
        (type_parameter_constraints_clause
          (identifier)
          (type_parameter_constraint (constructor_constraint)))
        (block)))))

=======================================
Class generic method with multiple type constraints
=======================================

class A {
  void Accept<T1, T2>(T1 accept, T2 from)
    where T1: new()
    where T2: T1, new() {
  }
}

---

(compilation_unit
  (class_declaration
    (identifier)
    (declaration_list
      (method_declaration
        (void_keyword)
        (identifier)
        (type_parameter_list
          (type_parameter (identifier))
          (type_parameter (identifier)))
        (parameter_list
          (parameter (identifier) (identifier))
          (parameter (identifier) (identifier)))
        (type_parameter_constraints_clause
          (identifier)
          (type_parameter_constraint (constructor_constraint)))
        (type_parameter_constraints_clause
          (identifier)
          (type_parameter_constraint (type_constraint (identifier)))
          (type_parameter_constraint (constructor_constraint)))
        (block)))))

=======================================
Class method with out parameter
=======================================

class A {
  void HasAnOut(out int a) {
  }
}

---

(compilation_unit
  (class_declaration
    (identifier)
    (declaration_list
      (method_declaration
        (void_keyword)
        (identifier)
        (parameter_list
          (parameter (parameter_modifier) (predefined_type) (identifier)))
        (block)))))

=======================================
Class method with in parameter
=======================================

class A {
  void HasAnOut(in int a) {
  }
}

---

(compilation_unit
  (class_declaration
    (identifier)
    (declaration_list
      (method_declaration
        (void_keyword)
        (identifier)
        (parameter_list
          (parameter (parameter_modifier) (predefined_type) (identifier)))
        (block)))))

=======================================
Class method with ref parameter
=======================================

class A {
  void HasAnOut(ref int a) {
  }
}

---

(compilation_unit
  (class_declaration
    (identifier)
    (declaration_list
      (method_declaration
        (void_keyword)
        (identifier)
        (parameter_list
          (parameter (parameter_modifier) (predefined_type) (identifier)))
        (block)))))

=======================================
Class method with default parameter
=======================================

class A {
  void HasAnOut(int a = 5) {
  }
}

---

(compilation_unit
  (class_declaration
    (identifier)
    (declaration_list
      (method_declaration
        (void_keyword)
        (identifier)
        (parameter_list
          (parameter
            (predefined_type)
            (identifier)
            (equals_value_clause (integer_literal))))
        (block)))))

=======================================
Class static method with single parameter
=======================================

class A {
  static int GetBack(int b) {
    return b;
  }
}

---

(compilation_unit
  (class_declaration
    (identifier)
    (declaration_list
      (method_declaration
        (modifier)
        (predefined_type)
        (identifier)
        (parameter_list
          (parameter (predefined_type) (identifier)))
        (block
          (return_statement (identifier)))))))


=======================================
Class method with explicit interface specifier
=======================================

class A : ISomething {
  int ISomething.GetBack(int b) {
    return b;
  }
}

---

(compilation_unit
  (class_declaration
    (identifier)
    (base_list (identifier))
    (declaration_list
      (method_declaration
        (predefined_type)
        (explicit_interface_specifier (identifier))
        (identifier)
        (parameter_list
          (parameter (predefined_type) (identifier)))
        (block
          (return_statement (identifier)))))))


=======================================
Class method with readonly method
=======================================

class A {
  public readonly double Add => x + y;
}

---

(compilation_unit
  (class_declaration
    (identifier)
    (declaration_list
      (property_declaration
        (modifier)
        (modifier)
        (predefined_type)
        (identifier)
        (arrow_expression_clause
          (binary_expression (identifier) (identifier)))))))