WordPress/Sniffs/Security/EscapeOutputSniff.php
protected function mergeFunctionLists() {
		if ( $this->customEscapingFunctions !== $this->addedCustomFunctions['escape'] ) {
			$customEscapeFunctions = $this->merge_custom_array( $this->customEscapingFunctions, array(), false );

			$this->escapingFunctions = $this->merge_custom_array(
				$customEscapeFunctions,
				$this->escapingFunctions
			);

			$this->addedCustomFunctions['escape'] = $this->customEscapingFunctions;
		}

		if ( $this->customAutoEscapedFunctions !== $this->addedCustomFunctions['autoescape'] ) {
			$this->autoEscapedFunctions = $this->merge_custom_array(
				$this->customAutoEscapedFunctions,
				$this->autoEscapedFunctions
			);

			$this->addedCustomFunctions['autoescape'] = $this->customAutoEscapedFunctions;
		}

		if ( $this->customPrintingFunctions !== $this->addedCustomFunctions['print'] ) {

			$this->printingFunctions = $this->merge_custom_array(
				$this->customPrintingFunctions,
				$this->printingFunctions
			);

			$this->addedCustomFunctions['print'] = $this->customPrintingFunctions;
		}
	}
protected function mergeFunctionLists() {
		if ( $this->customEscapingFunctions !== $this->addedCustomFunctions['escape'] ) {
			$customEscapeFunctions = $this->merge_custom_array( $this->customEscapingFunctions, array(), false );

			$this->escapingFunctions = $this->merge_custom_array(
				$customEscapeFunctions,
				$this->escapingFunctions
			);

			$this->addedCustomFunctions['escape'] = $this->customEscapingFunctions;
		}

		if ( $this->customAutoEscapedFunctions !== $this->addedCustomFunctions['autoescape'] ) {
			$this->autoEscapedFunctions = $this->merge_custom_array(
				$this->customAutoEscapedFunctions,
				$this->autoEscapedFunctions
			);

			$this->addedCustomFunctions['autoescape'] = $this->customAutoEscapedFunctions;
		}

		if ( $this->customPrintingFunctions !== $this->addedCustomFunctions['print'] ) {

			$this->printingFunctions = $this->merge_custom_array(
				$this->customPrintingFunctions,
				$this->printingFunctions
			);

			$this->addedCustomFunctions['print'] = $this->customPrintingFunctions;
		}
	}
Merge custom functions provided via a custom ruleset with the defaults, if we haven't already.

@since 0.11.0 Split out from the `process()` method.

@return void