idea/resources-en/inspectionDescriptions/SimplifiableCall.html - platform/external/jetbrains/kotlin - Git at Google

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 This inspection reports library function calls which could be replaced by simplified one,
 e.g. <b>flatMap { it }</b> call could be simplified to <b>flatten()</b>.
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	This inspection reports library function calls which could be replaced by simplified one,
	e.g. <b>flatMap { it }</b> call could be simplified to <b>flatten()</b>.
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	</html>