Looking at the set of methods in a ``class``, ``struct``, ``enum``, or ``extension`` and finding two methods that differ only by capitalization is confusing to users of the class. It is similarly confusing to have a method and a field or a case which differ only in capitalization.

== Noncompliant Code Example

----
class SomeClass {
    var lookUp = false
    func lookup(){ }        // Noncompliant; method name differs from field name only by capitalization
    func lookUP(){ }        // Noncompliant; method name differs from field and another method name only by capitalization
}
----

== Compliant Solution

----
class SomeClass {
    var lookUp = false
    func getLookUp(){ }
}
----