dbIsBlockageColoringAllowed

dbIsBlockageColoringAllowed(
d_blockageId
)
=> t / nil

Indicates whether the specified blockage is of a blockage type that can be colored. Only layer blockages can be colored.

This function does not check whether the layer associated with the blockage is colorable or not, as defined in the technology database.

d_blockageId

Specifies the blockage ID

`t`	Returns `t` if the blockage can be colored
`nil`	Returns `nil` if the blockage cannot be colored or there is an error

dbIsBlockageColoringAllowed( dbCreateLayerBlockage( cvId "M1" "routing" '((0 0) (100 0) (100 100)) ) ) => t

dbIsBlockageColoringAllowed( dbCreateAreaBlockage( cvId '((0 0) (100 0) (100 100)) ) ) => nil

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