Code Duplication    Length = 3-3 lines in 2 locations

ScriptHandler.php 2 locations

@@ 54-56 (lines=3) @@
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                throw new \InvalidArgumentException('The extra.css-compiler should contain only configuration objects.');
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            }
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            if (!isset($el[static::CONFIG_INPUT_KEY])) {
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                throw new \InvalidArgumentException('The extra.css-compiler[].' . static::CONFIG_INPUT_KEY . ' is required!');
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            }
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            if (!isset($el[static::CONFIG_OUTPUT_KEY])) {
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                throw new \InvalidArgumentException('The extra.css-compiler[].' . static::CONFIG_OUTPUT_KEY . ' is required!');
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            }
@@ 57-59 (lines=3) @@
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            if (!isset($el[static::CONFIG_INPUT_KEY])) {
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                throw new \InvalidArgumentException('The extra.css-compiler[].' . static::CONFIG_INPUT_KEY . ' is required!');
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            }
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            if (!isset($el[static::CONFIG_OUTPUT_KEY])) {
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                throw new \InvalidArgumentException('The extra.css-compiler[].' . static::CONFIG_OUTPUT_KEY . ' is required!');
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            }
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        }
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    }
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}