add integral alias constructor

Author: jClugstor

src/problems/integral_problems.jl

@@ -171,4 +171,14 @@ end
 struct IntegralAliasSpecifier <: AbstractAliasSpecifier
     alias_p
     alias_f
+end
+
+function IntegralAliasSpecifier(alias_p = nothing, alias_f = nothing, alias = nothing)
+    if alias == true
+        IntegralAliasSpecifier(true, true)
+    elseif alias == false
+        IntegralAliasSpecifier(false, false)
+    elseif isnothing(alias)
+        IntegralAliasSpecifier(alias_p, alias_f)
+    end
 end