change access modifier of the helpers from public to internal

Examples/DemosApp/DemosApp/Login/SwiftUILogin.swift

@@ -23,11 +23,11 @@ struct SwiftUILogin: View {
   @State private var isLoading = false
 
   private var isButtonEnabled: Bool {
-    return self.email.isNotEmpty
-    && self.password.isNotEmpty
+    return !self.email.isEmpty
+    && !self.password.isEmpty
     && self.isConsented
     && (
-      self.selectedPage == .signUp && self.name.isNotEmpty
+      self.selectedPage == .signUp && !self.name.isEmpty
       || self.selectedPage == .signIn
     )
   }

Examples/DemosApp/DemosApp/Login/UIKitLogin.swift

@@ -76,11 +76,11 @@ final class UIKitLogin: UIViewController {
   }
 
   private var isButtonEnabled: Bool {
-    return self.emailInput.text.isNotEmpty
-    && self.passwordInput.text.isNotEmpty
+    return !self.emailInput.text.isEmpty
+    && !self.passwordInput.text.isEmpty
     && self.consentCheckbox.isSelected
     && (
-      self.pageControl.selectedId == .signUp && self.nameInput.text.isNotEmpty
+      self.pageControl.selectedId == .signUp && !self.nameInput.text.isEmpty
       || self.pageControl.selectedId == .signIn
     )
   }

Sources/ComponentsKit/Helpers/Array+Safe.swift

@@ -1,21 +1,19 @@
 import Foundation
 
 extension Array {
-  /// Returns the element at the specified index iff it is within bounds, nil otherwise.
-  /// Complexity: O(1).
+  /// Returns the element at the specified index if it is within bounds, nil otherwise.
   ///
   /// - Parameter index: The index of the element to be returned.
   /// - Returns: The value that corresponds to the index. nil if the value cannot be found.
-  public subscript(safe index: Index) -> Iterator.Element? {
+  subscript(safe index: Index) -> Iterator.Element? {
     return self.isIndexValid(index) ? self[index] : nil
   }
 
   /// Checks whether the index is valid for the array.
-  /// Complexity: O(1).
   ///
   /// - Parameter index: The index to be checked.
   /// - Returns: true if the index is valid for the collection, false otherwise.
-  public func isIndexValid(_ index: Index) -> Bool {
+  func isIndexValid(_ index: Index) -> Bool {
     return index >= self.startIndex && index < self.endIndex
   }
 }

Sources/ComponentsKit/Helpers/Collection+Helpers.swift

@@ -2,7 +2,7 @@ import Foundation
 
 extension Collection {
   /// Whether the collection is not empty.
-  public var isNotEmpty: Bool {
+  var isNotEmpty: Bool {
     return !self.isEmpty
   }
 }

Sources/ComponentsKit/Helpers/Optional+Helpers.swift

@@ -2,19 +2,19 @@ import Foundation
 
 extension Optional {
   /// Whether the value is nil.
-  public var isNil: Bool {
+  var isNil: Bool {
     return self == nil
   }
 
   /// Whether the value is not nil.
-  public var isNotNil: Bool {
+  var isNotNil: Bool {
     return self != nil
   }
 }
 
 extension Optional where Wrapped: Collection {
   /// Whether the value is not nil and empty.
-  public var isNotNilAndEmpty: Bool {
+  var isNotNilAndEmpty: Bool {
     if let self {
       return self.isNotEmpty
     } else {
@@ -23,7 +23,7 @@ extension Optional where Wrapped: Collection {
   }
 
   /// Whether the value is nil or empty.
-  public var isNilOrEmpty: Bool {
+  var isNilOrEmpty: Bool {
     if let self {
       return self.isEmpty
     } else {