Change naming convension

[sshin23]

This PR changes

Par to Data to avoid naming conflicts with Parameter

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diff --git a/ext/ExaModelsMOI.jl b/ext/ExaModelsMOI.jl
index 64b3f7e..29bc7bb 100644
--- a/ext/ExaModelsMOI.jl
+++ b/ext/ExaModelsMOI.jl
@@ -487,7 +487,7 @@ function _exafy(e::MOI.ScalarAffineFunction{T}, var_to_idx, p = ()) where {T}
             c1, p = _exafy(term, var_to_idx, p)
             c1
         end for term in e.terms) +
-        ExaModels.DataIndexed(ExaModels.DataSource(), length(p) + 1)
+            ExaModels.DataIndexed(ExaModels.DataSource(), length(p) + 1)
     else
         ExaModels.DataIndexed(ExaModels.DataSource(), length(p) + 1)
     end
diff --git a/src/gradient.jl b/src/gradient.jl
index 39a677e..21fca26 100644
--- a/src/gradient.jl
+++ b/src/gradient.jl
@@ -68,7 +68,7 @@ Performs dsparse gradient evaluation via the reverse pass on the computation (su
     o1,
     cnt,
     adj,
-) where {D<:Union{AdjointNull,DataIndexed,Real}}
+    ) where {D <: Union{AdjointNull, DataIndexed, Real}}
     return cnt
 end
 @inline function grpass(d::D, comp, y, o1, cnt, adj) where {D<:AdjointNode1}
diff --git a/src/graph.jl b/src/graph.jl
index b85df20..ef53e39 100644
--- a/src/graph.jl
+++ b/src/graph.jl
@@ -79,11 +79,11 @@ A parameterized data node
 # Fields:
 - `inner::I`: parameter for the data
 """
-struct DataIndexed{I,J} <: AbstractNode
+struct DataIndexed{I, J} <: AbstractNode
     inner::I
 end
 
-@inline DataIndexed(inner::I, n) where {I} = DataIndexed{I,n}(inner)
+@inline DataIndexed(inner::I, n) where {I} = DataIndexed{I, n}(inner)
 """
     Node1{F, I}
 
@@ -119,7 +119,7 @@ end
 
 @inline Base.getproperty(n::DataSource, s::Symbol) = DataIndexed(n, s)
 @inline Base.getindex(n::DataSource, i) = DataIndexed(n, i)
-@inline Base.indexed_iterate(n::P, idx, start = 1) where P <: Union{DataSource, DataIndexed} = (DataIndexed(n, idx), idx + 1)
+@inline Base.indexed_iterate(n::P, idx, start = 1) where {P <: Union{DataSource, DataIndexed}} = (DataIndexed(n, idx), idx + 1)
 
 @inline Base.getproperty(v::DataIndexed{I, n}, s::Symbol) where {I, n} = DataIndexed(v, s)
 @inline Base.getindex(v::DataIndexed{I, n}, i) where {I, n} = DataIndexed(v, i)
@@ -148,7 +148,7 @@ struct Identity end
 @inline (v::ParameterNode{I})(::Identity, x, ::Nothing) where {I<:AbstractNode} = NaN
 
 @inline (v::DataSource)(i, x, θ) = i
-@inline (v::DataIndexed{I,n})(i, x, θ) where {I,n} = @inbounds getfield(getfield(v, :inner)(i, x, θ), n)
+@inline (v::DataIndexed{I, n})(i, x, θ) where {I, n} = @inbounds getfield(getfield(v, :inner)(i, x, θ), n)
 
 (v::DataIndexed)(i::Identity, x, θ) = NaN # despecialized
 (v::DataSource)(i::Identity, x, θ) = NaN # despecialized