DictionaryShouldContainsKey is triggered on custom ContainsKey

[jnyrup]

Description

When a class implements IDictionary and a custom ContainsKey(TKey1, TKey2), the analyzer does not distinguish between IDictionary.ContainsKey(TKey) and ContainsKey(TKey1, TKey2). Related to #65

Complete minimal example reproducing the issue

public class MultiKeyDict<TKey1, TKey2, TValue> 
    : Dictionary<TKey1, Dictionary<TKey2, TValue>>
{
    public bool ContainsKey(TKey1 key1, TKey2 key2) => false;
}

[TestMethod]
public void MyTestMethod()
{
    var dict = new MultiKeyDict<int, int, string>();

    dict.ContainsKey(0, 1).Should().BeTrue();
}

Expected behavior:

No analyzer should be triggered.

Actual behavior:

DictionaryShouldContainsKey is suggested, but is not applicable as GenericDictionaryAssertions<TKey, TValue> does not implement ContainKey(TKey1, TKey2).

Versions

• Which version of Fluent Assertions Analyzers are you using?
  • 0.11.4
• Which .NET runtime and version are you targeting? E.g. .NET framework 4.6.1 or .NET Core 2.0.
  • net472