Add Base.filter for Detector and DetectorModule

src/hardware.jl

@@ -95,6 +95,8 @@ Get the PMT for a given DAQ channel ID (TDC)
 """
 getpmt(d::DetectorModule, channel_id::Integer) = d[channel_id]
 
+Base.filter(f::Function, d::DetectorModule) = filter(f, getpmts(d))
+
 """
 
 Calculate the centre of a module by fitting the crossing point of the PMT axes.
@@ -347,6 +349,8 @@ function Base.getindex(d::Detector, ::Colon, floors::UnitRange{T}) where T<:Inte
     sort!(modules)
 end
 
+Base.filter(f::Function, d::Detector) = filter(f, modules(d))
+
 """
 
 Returns true if there is a module at the given location.