Extensions you can drag onto your project if you want to keep using a custom apply operator after EasyPeasy 1.6.0

CustomApplyOperator.swift

import EasyPeasy

#if os(iOS) || os(tvOS)
    
import UIKit

infix operator <~
    
/**
     Apply operator definitions
 */
public extension UIView {

    /**
        Operator which applies the attribute given to the view located
        in the left hand side of it
        - parameter lhs: `UIView` the attributes will apply to
        - parameter rhs: Attribute applied to the `UIView`
        - returns: The array of `NSLayoutConstraints` applied
     */
    @discardableResult public static func <~ (lhs: UIView, rhs: Attribute) -> [NSLayoutConstraint] {
        return lhs <~ [rhs]
    }

    /**
        Opeator which applies the attributes given to the view located
         in the left hand side of it
         - parameter lhs: UIView the attributes will apply to
         - parameter rhs: Attributes applied to the UIView
         - returns: The array of `NSLayoutConstraints` applied
     */
    @discardableResult public static func <~ (lhs: UIView, rhs: [Attribute]) -> [NSLayoutConstraint] {
        // Apply attributes and return the installed `NSLayoutConstraints`
        return lhs.easy.layout(rhs)
    }
    
}

/**
    Apply operator definitions
 */
@available (iOS 9.0, *)
public extension UILayoutGuide {
    
    /**
        Operator which applies the attribute given to the `UILayoutGuide`
        located in the left hand side of it
        - parameter lhs: `UILayoutGuide` the attributes will apply to
        - parameter rhs: Attribute applied to the `UILayoutGuide`
        - returns: The array of `NSLayoutConstraints` applied
     */
    @discardableResult public static func <~ (lhs: UILayoutGuide, rhs: Attribute) -> [NSLayoutConstraint] {
        return lhs <~ [rhs]
    }

    /**
        Opeator which applies the attributes given to the `UILayoutGuide`
        located in the left hand side of it
        - parameter lhs: `UILayoutGuide` the attributes will apply to
        - parameter rhs: Attributes applied to the `UILayoutGuide`
        - returns: The array of `NSLayoutConstraints` applied
     */
    @discardableResult public static func <~ (lhs: UILayoutGuide, rhs: [Attribute]) -> [NSLayoutConstraint] {
        // Apply attributes and return the installed `NSLayoutConstraints`
        return lhs.easy.layout(rhs)
    }

}
    
#else
    
import AppKit

infix operator <~
   
/**
    Apply operator definitions
 */
public extension NSView {

    /**
         Operator which applies the attribute given to the view located
         in the left hand side of it
         - parameter lhs: `NSView` the attributes will apply to
         - parameter rhs: Attribute applied to the `NSView`
         - returns: The array of `NSLayoutConstraints` applied
     */
    @discardableResult static public func <~ (lhs: NSView, rhs: Attribute) -> [NSLayoutConstraint] {
        return lhs <~ [rhs]
    }

    /**
         Opeator which applies the attributes given to the view located
         in the left hand side of it
         - parameter lhs: NSView the attributes will apply to
         - parameter rhs: Attributes applied to the NSView
         - returns: The array of `NSLayoutConstraints` applied
     */
    @discardableResult static public func <~ (lhs: NSView, rhs: [Attribute]) -> [NSLayoutConstraint] {
        // Apply attributes and return the installed `NSLayoutConstraints`
        return lhs.easy.layout(rhs)
    }
    
}

/**
    Apply operator definitions
 */
@available (OSX 10.11, *)
extension NSLayoutGuide {

    /**
         Operator which applies the attribute given to the `NSLayoutGuide`
         located in the left hand side of it
         - parameter lhs: `NSLayoutGuide` the attributes will apply to
         - parameter rhs: Attribute applied to the `NSLayoutGuide`
         - returns: The array of `NSLayoutConstraints` applied
     */
    @discardableResult public static func <~ (lhs: NSLayoutGuide, rhs: Attribute) -> [NSLayoutConstraint] {
        return lhs <~ [rhs]
    }

    /**
         Opeator which applies the attributes given to the `NSLayoutGuide`
         located in the left hand side of it
         - parameter lhs: `NSLayoutGuide` the attributes will apply to
         - parameter rhs: Attributes applied to the `NSLayoutGuide`
         - returns: The array of `NSLayoutConstraints` applied
     */
    @discardableResult public static func <~ (lhs: NSLayoutGuide, rhs: [Attribute]) -> [NSLayoutConstraint] {
        // Apply attributes and return the installed `NSLayoutConstraints`
        return lhs.easy.layout(rhs)
    }

}
    
#endif