CompositeFunctionParameter class

A function parameter that includes other named parameter instead of just wrapping single types.

Consider this contract:

pragma solidity >=0.4.19 <0.7.0;
pragma experimental ABIEncoderV2;

contract Test {
  struct S { uint a; uint[] b; T[] c; }
  struct T { uint x; uint y; }
  function f(S memory s, T memory t, uint a) public;
  function g() public returns (S memory s, T memory t, uint a);
}

For the parameter s in the function f, we still want to know the names of the components in the tuple. Simply knowing that it's a tuple is not enough. Similarly, we want to know the names of the parameters of T in S.c.