add ismagnetic function

Author: Datseris

Project.toml

@@ -1,7 +1,7 @@
 name = "DynamicalBilliards"
 uuid = "4986ee89-4ee5-5cef-b6b8-e49ba721d7a5"
 repo = "https://github.com/JuliaDynamics/DynamicalBilliards.jl.git"
-version = "3.10.3"
+version = "3.10.2"
 
 [deps]
 Distributed = "8ba89e20-285c-5b6f-9357-94700520ee1b"

src/billiards/particles.jl

@@ -85,6 +85,9 @@ mutable struct MagneticParticle{T<:AbstractFloat} <: AbstractParticle{T}
     end
 end
 
+ismagnetic(x) = false
+ismagnetic(x::MagneticParticle) = true
+
 function Base.getproperty(p::MagneticParticle, s::Symbol)
     if s == :ω
         return Base.getfield(p, :omega)